662166531 has 12 divisors (see below), whose sum is σ = 1030037008. Its totient is φ = 407487024.

The previous prime is 662166521. The next prime is 662166569. The reversal of 662166531 is 135661266.

662166531 is a `hidden beast` number, since 6 + 62 + 1 + 66 + 531 = 666.

It is not a de Polignac number, because 662166531 - 2¹⁰ = 662165507 is a prime.

It is a super-2 number, since 2×662166531² = 876929029553147922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (662166521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2829655 + ... + 2829888.

Almost surely, 2^662166531 is an apocalyptic number.

662166531 is a deficient number, since it is larger than the sum of its proper divisors (367870477).

662166531 is a wasteful number, since it uses less digits than its factorization.

662166531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5659562 (or 5659559 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 662166531 is about 25732.5966625990. The cubic root of 662166531 is about 871.6104100041.

The spelling of 662166531 in words is "six hundred sixty-two million, one hundred sixty-six thousand, five hundred thirty-one".