662166631 has 12 divisors (see below), whose sum is σ = 761038096. Its totient is φ = 564382080.

The previous prime is 662166629. The next prime is 662166649. The reversal of 662166631 is 136661266.

It is not a de Polignac number, because 662166631 - 2¹ = 662166629 is a prime.

It is a super-2 number, since 2×662166631² = 876929294419780322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662166601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254071 + ... + 256663.

Almost surely, 2^662166631 is an apocalyptic number.

662166631 is a deficient number, since it is larger than the sum of its proper divisors (98871465).

662166631 is an equidigital number, since it uses as much as digits as its factorization.

662166631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2982 (or 2791 counting only the distinct ones).

The product of its digits is 46656, while the sum is 37.

The square root of 662166631 is about 25732.5986056597. The cubic root of 662166631 is about 871.6104538808.

The spelling of 662166631 in words is "six hundred sixty-two million, one hundred sixty-six thousand, six hundred thirty-one".