66858825254080 has 112 divisors (see below), whose sum is σ = 162259905461760. Its totient is φ = 26234143423488.

The previous prime is 66858825254041. The next prime is 66858825254083. The reversal of 66858825254080 is 8045252885866.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a junction number, because it is equal to n+sod(n) for n = 66858825253997 and 66858825254015.

It is not an unprimeable number, because it can be changed into a prime (66858825254083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1399722 + ... + 11648041.

Almost surely, 2^{66858825254080} is an apocalyptic number.

It is an amenable number.

66858825254080 is an abundant number, since it is smaller than the sum of its proper divisors (95401080207680).

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

66858825254080 is a wasteful number, since it uses less digits than its factorization.

66858825254080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13048086 (or 13048076 counting only the distinct ones).

The product of its (nonzero) digits is 294912000, while the sum is 67.

The spelling of 66858825254080 in words is "sixty-six trillion, eight hundred fifty-eight billion, eight hundred twenty-five million, two hundred fifty-four thousand, eighty".