166697954452 has 6 divisors (see below), whose sum is σ = 291721420298. Its totient is φ = 83348977224.

The previous prime is 166697954441. The next prime is 166697954491. The reversal of 166697954452 is 254459796661.

It can be written as a sum of positive squares in only one way, i.e., 92650836996 + 74047117456 = 304386^2 + 272116^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20837244303 + ... + 20837244310.

Almost surely, 2^166697954452 is an apocalyptic number.

It is an amenable number.

166697954452 is a deficient number, since it is larger than the sum of its proper divisors (125023465846).

166697954452 is a wasteful number, since it uses less digits than its factorization.

166697954452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41674488617 (or 41674488615 counting only the distinct ones).

The product of its digits is 97977600, while the sum is 64.

The spelling of 166697954452 in words is "one hundred sixty-six billion, six hundred ninety-seven million, nine hundred fifty-four thousand, four hundred fifty-two".