66862949831 has 2 divisors, whose sum is σ = 66862949832. Its totient is φ = 66862949830.

The previous prime is 66862949827. The next prime is 66862949887. The reversal of 66862949831 is 13894926866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66862949831 - 2² = 66862949827 is a prime.

It is a super-2 number, since 2×66862949831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66862949821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33431474915 + 33431474916.

It is an arithmetic number, because the mean of its divisors is an integer number (33431474916).

Almost surely, 2^66862949831 is an apocalyptic number.

66862949831 is a deficient number, since it is larger than the sum of its proper divisors (1).

66862949831 is an equidigital number, since it uses as much as digits as its factorization.

66862949831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26873856, while the sum is 62.

The spelling of 66862949831 in words is "sixty-six billion, eight hundred sixty-two million, nine hundred forty-nine thousand, eight hundred thirty-one".