166736987830 has 24 divisors (see below), whose sum is σ = 349126836768. Its totient is φ = 57166967088.

The previous prime is 166736987827. The next prime is 166736987891. The reversal of 166736987830 is 38789637661.

166736987830 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166736987830² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170139294 + ... + 170140273.

It is an arithmetic number, because the mean of its divisors is an integer number (14546951532).

Almost surely, 2^166736987830 is an apocalyptic number.

166736987830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166736987830 is an abundant number, since it is smaller than the sum of its proper divisors (182389848938).

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

166736987830 is a wasteful number, since it uses less digits than its factorization.

166736987830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340279588 (or 340279581 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 64.

The spelling of 166736987830 in words is "one hundred sixty-six billion, seven hundred thirty-six million, nine hundred eighty-seven thousand, eight hundred thirty".