65813920999 has 2 divisors, whose sum is σ = 65813921000. Its totient is φ = 65813920998.

The previous prime is 65813920919. The next prime is 65813921003. The reversal of 65813920999 is 99902931856.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65813920999 - 2²⁹ = 65277050087 is a prime.

It is a super-2 number, since 2×65813920999² (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 (65813920919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32906960499 + 32906960500.

It is an arithmetic number, because the mean of its divisors is an integer number (32906960500).

Almost surely, 2^65813920999 is an apocalyptic number.

65813920999 is a deficient number, since it is larger than the sum of its proper divisors (1).

65813920999 is an equidigital number, since it uses as much as digits as its factorization.

65813920999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9447840, while the sum is 61.

The spelling of 65813920999 in words is "sixty-five billion, eight hundred thirteen million, nine hundred twenty thousand, nine hundred ninety-nine".