101666511705220 has 96 divisors (see below), whose sum is σ = 266219234620416. Its totient is φ = 31683760752000.

The previous prime is 101666511705169. The next prime is 101666511705247. The reversal of 101666511705220 is 22507115666101.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6159495 + ... + 15532945.

It is an arithmetic number, because the mean of its divisors is an integer number (2773117027296).

Almost surely, 2^{101666511705220} is an apocalyptic number.

101666511705220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101666511705220 is an abundant number, since it is smaller than the sum of its proper divisors (164552722915196).

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

101666511705220 is a wasteful number, since it uses less digits than its factorization.

101666511705220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9380521 (or 9380519 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 101666511705220 in words is "one hundred one trillion, six hundred sixty-six billion, five hundred eleven million, seven hundred five thousand, two hundred twenty".