165256516264066 has 16 divisors (see below), whose sum is σ = 251037337760640. Its totient is φ = 81577526855760.

The previous prime is 165256516264003. The next prime is 165256516264141. The reversal of 165256516264066 is 660462615652561.

It is a junction number, because it is equal to n+sod(n) for n = 165256516263995 and 165256516264013.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28102165 + ... + 33470056.

It is an arithmetic number, because the mean of its divisors is an integer number (15689833610040).

Almost surely, 2^{165256516264066} is an apocalyptic number.

165256516264066 is a deficient number, since it is larger than the sum of its proper divisors (85780821496574).

165256516264066 is a wasteful number, since it uses less digits than its factorization.

165256516264066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61589289.

The product of its (nonzero) digits is 93312000, while the sum is 61.

The spelling of 165256516264066 in words is "one hundred sixty-five trillion, two hundred fifty-six billion, five hundred sixteen million, two hundred sixty-four thousand, sixty-six".