166511388496 has 20 divisors (see below), whose sum is σ = 330118509952. Its totient is φ = 81319514976.

The previous prime is 166511388487. The next prime is 166511388499. The reversal of 166511388496 is 694883115661.

It is a super-2 number, since 2×166511388496² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166511388496.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166511388499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121010496 + ... + 121011871.

Almost surely, 2^166511388496 is an apocalyptic number.

166511388496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166511388496 is a deficient number, since it is larger than the sum of its proper divisors (163607121456).

166511388496 is a wasteful number, since it uses less digits than its factorization.

166511388496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242022418 (or 242022412 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 58.

The spelling of 166511388496 in words is "one hundred sixty-six billion, five hundred eleven million, three hundred eighty-eight thousand, four hundred ninety-six".