165566611452 has 48 divisors (see below), whose sum is σ = 439765869312. Its totient is φ = 47990321280.

The previous prime is 165566611417. The next prime is 165566611501. The reversal of 165566611452 is 254116665561.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27264193 + ... + 27270264.

It is an arithmetic number, because the mean of its divisors is an integer number (9161788944).

Almost surely, 2^165566611452 is an apocalyptic number.

165566611452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165566611452 is an abundant number, since it is smaller than the sum of its proper divisors (274199257860).

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

165566611452 is a wasteful number, since it uses less digits than its factorization.

165566611452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54534498 (or 54534496 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 48.

The spelling of 165566611452 in words is "one hundred sixty-five billion, five hundred sixty-six million, six hundred eleven thousand, four hundred fifty-two".