65166191380080 has 480 divisors, whose sum is σ = 265172086233600. Its totient is φ = 14009653168128.

The previous prime is 65166191380067. The next prime is 65166191380093. The reversal of 65166191380080 is 8008319166156.

65166191380080 is a `hidden beast` number, since 6 + 5 + 1 + 6 + 619 + 13 + 8 + 0 + 0 + 8 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (65166191380067) and next prime (65166191380093).

It is a junction number, because it is equal to n+sod(n) for n = 65166191379999 and 65166191380026.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10862742 + ... + 15758538.

It is an arithmetic number, because the mean of its divisors is an integer number (552441846320).

Almost surely, 2^{65166191380080} is an apocalyptic number.

65166191380080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65166191380080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132586043116800).

65166191380080 is an abundant number, since it is smaller than the sum of its proper divisors (200005894853520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65166191380080 is a wasteful number, since it uses less digits than its factorization.

65166191380080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4895981 (or 4895972 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 65166191380080 in words is "sixty-five trillion, one hundred sixty-six billion, one hundred ninety-one million, three hundred eighty thousand, eighty".