166100455510020 has 72 divisors (see below), whose sum is σ = 503839429067520. Its totient is φ = 44293333423680.

The previous prime is 166100455510009. The next prime is 166100455510081. The reversal of 166100455510020 is 20015554001661.

166100455510020 is a `hidden beast` number, since 1 + 6 + 61 + 0 + 0 + 45 + 551 + 0 + 0 + 2 + 0 = 666.

It is a super-2 number, since 2×166100455510020² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78565551 + ... + 80652009.

It is an arithmetic number, because the mean of its divisors is an integer number (6997769848160).

Almost surely, 2^{166100455510020} is an apocalyptic number.

166100455510020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166100455510020 is an abundant number, since it is smaller than the sum of its proper divisors (337738973557500).

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

166100455510020 is a wasteful number, since it uses less digits than its factorization.

166100455510020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528745 (or 2528740 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 166100455510020 in words is "one hundred sixty-six trillion, one hundred billion, four hundred fifty-five million, five hundred ten thousand, twenty".