165056651566650 has 72 divisors (see below), whose sum is σ = 443454783595200. Its totient is φ = 44014851033120.

The previous prime is 165056651566627. The next prime is 165056651566687. The reversal of 165056651566650 is 56665156650561.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 83880751 + ... + 85825949.

It is an arithmetic number, because the mean of its divisors is an integer number (6159094216600).

Almost surely, 2^{165056651566650} is an apocalyptic number.

165056651566650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165056651566650 is an abundant number, since it is smaller than the sum of its proper divisors (278398132028550).

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

165056651566650 is a wasteful number, since it uses less digits than its factorization.

165056651566650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133780 (or 2133772 counting only the distinct ones).

The product of its (nonzero) digits is 145800000, while the sum is 63.

The spelling of 165056651566650 in words is "one hundred sixty-five trillion, fifty-six billion, six hundred fifty-one million, five hundred sixty-six thousand, six hundred fifty".