166515552530 has 32 divisors (see below), whose sum is σ = 306815693184. Its totient is φ = 65032361856.

The previous prime is 166515552503. The next prime is 166515552563. The reversal of 166515552530 is 35255515661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1072382 + ... + 1217798.

It is an arithmetic number, because the mean of its divisors is an integer number (9587990412).

Almost surely, 2^166515552530 is an apocalyptic number.

166515552530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166515552530 is a deficient number, since it is larger than the sum of its proper divisors (140300140654).

166515552530 is a wasteful number, since it uses less digits than its factorization.

166515552530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148130.

The product of its (nonzero) digits is 675000, while the sum is 44.

The spelling of 166515552530 in words is "one hundred sixty-six billion, five hundred fifteen million, five hundred fifty-two thousand, five hundred thirty".