6662505631 has 2 divisors, whose sum is σ = 6662505632. Its totient is φ = 6662505630.

The previous prime is 6662505607. The next prime is 6662505637. The reversal of 6662505631 is 1365052666.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6662505631 - 2¹¹ = 6662503583 is a prime.

It is a super-2 number, since 2×6662505631² = 88777962566213416322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6662505637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3331252815 + 3331252816.

It is an arithmetic number, because the mean of its divisors is an integer number (3331252816).

Almost surely, 2^6662505631 is an apocalyptic number.

6662505631 is a deficient number, since it is larger than the sum of its proper divisors (1).

6662505631 is an equidigital number, since it uses as much as digits as its factorization.

6662505631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 6662505631 is about 81624.1730800380. The cubic root of 6662505631 is about 1881.6804078193.

The spelling of 6662505631 in words is "six billion, six hundred sixty-two million, five hundred five thousand, six hundred thirty-one".