166919964918 has 16 divisors (see below), whose sum is σ = 381531348480. Its totient is φ = 47691418536.

The previous prime is 166919964899. The next prime is 166919964943. The reversal of 166919964918 is 819469919661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1987142398 + ... + 1987142481.

It is an arithmetic number, because the mean of its divisors is an integer number (23845709280).

Almost surely, 2^166919964918 is an apocalyptic number.

166919964918 is an abundant number, since it is smaller than the sum of its proper divisors (214611383562).

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

166919964918 is a wasteful number, since it uses less digits than its factorization.

166919964918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3974284891.

The product of its digits is 45349632, while the sum is 69.

The spelling of 166919964918 in words is "one hundred sixty-six billion, nine hundred nineteen million, nine hundred sixty-four thousand, nine hundred eighteen".