166170515555020 has 48 divisors (see below), whose sum is σ = 349019183368800. Its totient is φ = 66456569189376.

The previous prime is 166170515554999. The next prime is 166170515555113. The reversal of 166170515555020 is 20555515071661.

It is a super-2 number, since 2×166170515555020² (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 15 ways as a sum of consecutive naturals, for example, 3450145459 + ... + 3450193621.

It is an arithmetic number, because the mean of its divisors is an integer number (7271232986850).

Almost surely, 2^{166170515555020} is an apocalyptic number.

166170515555020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166170515555020 is an abundant number, since it is smaller than the sum of its proper divisors (182848667813780).

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

166170515555020 is a wasteful number, since it uses less digits than its factorization.

166170515555020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74794 (or 74792 counting only the distinct ones).

The product of its (nonzero) digits is 1575000, while the sum is 49.

The spelling of 166170515555020 in words is "one hundred sixty-six trillion, one hundred seventy billion, five hundred fifteen million, five hundred fifty-five thousand, twenty".