166697954444 has 24 divisors (see below), whose sum is σ = 333488133888. Its totient is φ = 71422218000.

The previous prime is 166697954441. The next prime is 166697954491. The reversal of 166697954444 is 444459796661.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (166697954441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 720182 + ... + 923069.

It is an arithmetic number, because the mean of its divisors is an integer number (13895338912).

Almost surely, 2^166697954444 is an apocalyptic number.

166697954444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

166697954444 is an abundant number, since it is smaller than the sum of its proper divisors (166790179444).

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

166697954444 is a wasteful number, since it uses less digits than its factorization.

166697954444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646885 (or 1646883 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 65.

The spelling of 166697954444 in words is "one hundred sixty-six billion, six hundred ninety-seven million, nine hundred fifty-four thousand, four hundred forty-four".