553666631 has 24 divisors (see below), whose sum is σ = 696325680. Its totient is φ = 437415552.

The previous prime is 553666621. The next prime is 553666643. The reversal of 553666631 is 136666355.

It is not a de Polignac number, because 553666631 - 2²⁶ = 486557767 is a prime.

It is a super-2 number, since 2×553666631² = 613093476565780322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (553666621) 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, 26411 + ... + 42483.

It is an arithmetic number, because the mean of its divisors is an integer number (29013570).

Almost surely, 2^553666631 is an apocalyptic number.

553666631 is a deficient number, since it is larger than the sum of its proper divisors (142659049).

553666631 is a wasteful number, since it uses less digits than its factorization.

553666631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16143 (or 16136 counting only the distinct ones).

The product of its digits is 291600, while the sum is 41.

The square root of 553666631 is about 23530.1217803903. The cubic root of 553666631 is about 821.1379357911.

The spelling of 553666631 in words is "five hundred fifty-three million, six hundred sixty-six thousand, six hundred thirty-one".