166697319933 has 24 divisors (see below), whose sum is σ = 243549130968. Its totient is φ = 109862992512.

The previous prime is 166697319923. The next prime is 166697319941. The reversal of 166697319933 is 339913796661.

It can be written as a sum of positive squares in 4 ways, for example, as 36077963364 + 130619356569 = 189942^2 + 361413^2 .

It is not a de Polignac number, because 166697319933 - 2¹⁸ = 166697057789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166697319913) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21066 + ... + 577787.

It is an arithmetic number, because the mean of its divisors is an integer number (10147880457).

Almost surely, 2^166697319933 is an apocalyptic number.

It is an amenable number.

166697319933 is a deficient number, since it is larger than the sum of its proper divisors (76851811035).

166697319933 is a wasteful number, since it uses less digits than its factorization.

166697319933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599213 (or 599210 counting only the distinct ones).

The product of its digits is 29760696, while the sum is 63.

The spelling of 166697319933 in words is "one hundred sixty-six billion, six hundred ninety-seven million, three hundred nineteen thousand, nine hundred thirty-three".