166563258510000 has 400 divisors, whose sum is σ = 617441256051840. Its totient is φ = 38253761280000.

The previous prime is 166563258509987. The next prime is 166563258510001. The reversal of 166563258510000 is 15852365661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (400).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (166563258510001) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7012557 + ... + 19552556.

Almost surely, 2^{166563258510000} is an apocalyptic number.

166563258510000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166563258510000 is an abundant number, since it is smaller than the sum of its proper divisors (450877997541840).

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

166563258510000 is a wasteful number, since it uses less digits than its factorization.

166563258510000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26565174 (or 26565153 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 48.

The spelling of 166563258510000 in words is "one hundred sixty-six trillion, five hundred sixty-three billion, two hundred fifty-eight million, five hundred ten thousand".