63660615157 has 2 divisors, whose sum is σ = 63660615158. Its totient is φ = 63660615156.

The previous prime is 63660615107. The next prime is 63660615191. The reversal of 63660615157 is 75151606636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61140474756 + 2520140401 = 247266^2 + 50201^2 .

It is a cyclic number.

It is not a de Polignac number, because 63660615157 - 2¹¹ = 63660613109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63660615107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31830307578 + 31830307579.

It is an arithmetic number, because the mean of its divisors is an integer number (31830307579).

Almost surely, 2^63660615157 is an apocalyptic number.

It is an amenable number.

63660615157 is a deficient number, since it is larger than the sum of its proper divisors (1).

63660615157 is an equidigital number, since it uses as much as digits as its factorization.

63660615157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 63660615157 in words is "sixty-three billion, six hundred sixty million, six hundred fifteen thousand, one hundred fifty-seven".