166705940922318 has 80 divisors (see below), whose sum is σ = 431135150982624. Its totient is φ = 47158681982400.

The previous prime is 166705940922149. The next prime is 166705940922359. The reversal of 166705940922318 is 813229049507661.

166705940922318 is a `hidden beast` number, since 1 + 6 + 6 + 7 + 0 + 594 + 0 + 9 + 2 + 2 + 31 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 727642905 + ... + 727871972.

It is a 1-persistent number, because it is pandigital, but 2⋅166705940922318 = 333411881844636 is not.

Almost surely, 2^{166705940922318} is an apocalyptic number.

166705940922318 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

166705940922318 is an abundant number, since it is smaller than the sum of its proper divisors (264429210060306).

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

166705940922318 is a wasteful number, since it uses less digits than its factorization.

166705940922318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455514999 (or 1455514990 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 166705940922318 in words is "one hundred sixty-six trillion, seven hundred five billion, nine hundred forty million, nine hundred twenty-two thousand, three hundred eighteen".