631666733623 has 2 divisors, whose sum is σ = 631666733624. Its totient is φ = 631666733622.

The previous prime is 631666733609. The next prime is 631666733629. The reversal of 631666733623 is 326337666136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631666733623 - 2¹⁷ = 631666602551 is a prime.

It is a super-2 number, since 2×631666733623² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631666733629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315833366811 + 315833366812.

It is an arithmetic number, because the mean of its divisors is an integer number (315833366812).

Almost surely, 2^631666733623 is an apocalyptic number.

631666733623 is a deficient number, since it is larger than the sum of its proper divisors (1).

631666733623 is an equidigital number, since it uses as much as digits as its factorization.

631666733623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8817984, while the sum is 52.

The spelling of 631666733623 in words is "six hundred thirty-one billion, six hundred sixty-six million, seven hundred thirty-three thousand, six hundred twenty-three".