65611307987 has 2 divisors, whose sum is σ = 65611307988. Its totient is φ = 65611307986.

The previous prime is 65611307981. The next prime is 65611308031. The reversal of 65611307987 is 78970311656.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65611307987 is a prime.

It is not a weakly prime, because it can be changed into another prime (65611307981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32805653993 + 32805653994.

It is an arithmetic number, because the mean of its divisors is an integer number (32805653994).

Almost surely, 2^65611307987 is an apocalyptic number.

65611307987 is a deficient number, since it is larger than the sum of its proper divisors (1).

65611307987 is an equidigital number, since it uses as much as digits as its factorization.

65611307987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 65611307987 in words is "sixty-five billion, six hundred eleven million, three hundred seven thousand, nine hundred eighty-seven".