166415020401264 has 40 divisors (see below), whose sum is σ = 430464514289040. Its totient is φ = 55399538638848.

The previous prime is 166415020401247. The next prime is 166415020401269. The reversal of 166415020401264 is 462104020514661.

It is a happy number.

It is a super-2 number, since 2×166415020401264² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166415020401269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2254176087 + ... + 2254249910.

It is an arithmetic number, because the mean of its divisors is an integer number (10761612857226).

Almost surely, 2^{166415020401264} is an apocalyptic number.

It is an amenable number.

166415020401264 is an abundant number, since it is smaller than the sum of its proper divisors (264049493887776).

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

166415020401264 is a wasteful number, since it uses less digits than its factorization.

166415020401264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4508426777 (or 4508426771 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 166415020401264 in words is "one hundred sixty-six trillion, four hundred fifteen billion, twenty million, four hundred one thousand, two hundred sixty-four".