660164962531 has 2 divisors, whose sum is σ = 660164962532. Its totient is φ = 660164962530.

The previous prime is 660164962493. The next prime is 660164962549. The reversal of 660164962531 is 135269461066.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660164962531 is a prime.

It is a super-2 number, since 2×660164962531² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (660164962571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330082481265 + 330082481266.

It is an arithmetic number, because the mean of its divisors is an integer number (330082481266).

Almost surely, 2^660164962531 is an apocalyptic number.

660164962531 is a deficient number, since it is larger than the sum of its proper divisors (1).

660164962531 is an equidigital number, since it uses as much as digits as its factorization.

660164962531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The spelling of 660164962531 in words is "six hundred sixty billion, one hundred sixty-four million, nine hundred sixty-two thousand, five hundred thirty-one".