166021564203052 has 24 divisors (see below), whose sum is σ = 292629943316480. Its totient is φ = 82413017159760.

The previous prime is 166021564203043. The next prime is 166021564203073. The reversal of 166021564203052 is 250302465120661.

It is a super-2 number, since 2×166021564203052² (a number of 29 digits) contains 22 as substring.

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, 86929477 + ... + 88818787.

Almost surely, 2^{166021564203052} is an apocalyptic number.

It is an amenable number.

166021564203052 is a deficient number, since it is larger than the sum of its proper divisors (126608379113428).

166021564203052 is a wasteful number, since it uses less digits than its factorization.

166021564203052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2047501 (or 2047499 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 166021564203052 in words is "one hundred sixty-six trillion, twenty-one billion, five hundred sixty-four million, two hundred three thousand, fifty-two".