166390136234 has 64 divisors (see below), whose sum is σ = 292565606400. Its totient is φ = 70942717440.

The previous prime is 166390136197. The next prime is 166390136239. The reversal of 166390136234 is 432631093661.

It is not an unprimeable number, because it can be changed into a prime (166390136239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176822204 + ... + 176823144.

It is an arithmetic number, because the mean of its divisors is an integer number (4571337600).

Almost surely, 2^166390136234 is an apocalyptic number.

166390136234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

166390136234 is a deficient number, since it is larger than the sum of its proper divisors (126175470166).

166390136234 is an equidigital number, since it uses as much as digits as its factorization.

166390136234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020 (or 2006 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 44.

The spelling of 166390136234 in words is "one hundred sixty-six billion, three hundred ninety million, one hundred thirty-six thousand, two hundred thirty-four".