61660126631 has 2 divisors, whose sum is σ = 61660126632. Its totient is φ = 61660126630.

The previous prime is 61660126609. The next prime is 61660126667. The reversal of 61660126631 is 13662106616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61660126631 - 2¹⁰ = 61660125607 is a prime.

It is a super-2 number, since 2×61660126631² (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 (61660126681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30830063315 + 30830063316.

It is an arithmetic number, because the mean of its divisors is an integer number (30830063316).

Almost surely, 2^61660126631 is an apocalyptic number.

61660126631 is a deficient number, since it is larger than the sum of its proper divisors (1).

61660126631 is an equidigital number, since it uses as much as digits as its factorization.

61660126631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 38.

The spelling of 61660126631 in words is "sixty-one billion, six hundred sixty million, one hundred twenty-six thousand, six hundred thirty-one".