66214325880 has 256 divisors, whose sum is σ = 235518912000. Its totient is φ = 16498308096.

The previous prime is 66214325873. The next prime is 66214325917. The reversal of 66214325880 is 8852341266.

66214325880 is a `hidden beast` number, since 6 + 6 + 21 + 43 + 2 + 588 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1475859 + ... + 1520061.

It is an arithmetic number, because the mean of its divisors is an integer number (919995750).

Almost surely, 2^66214325880 is an apocalyptic number.

66214325880 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 66214325880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117759456000).

66214325880 is an abundant number, since it is smaller than the sum of its proper divisors (169304586120).

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

66214325880 is a wasteful number, since it uses less digits than its factorization.

66214325880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44315 (or 44305 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 66214325880 in words is "sixty-six billion, two hundred fourteen million, three hundred twenty-five thousand, eight hundred eighty".