65399874771 has 32 divisors (see below), whose sum is σ = 111654978048. Its totient is φ = 33055741440.

The previous prime is 65399874767. The next prime is 65399874809. The reversal of 65399874771 is 17747899356.

It is not a de Polignac number, because 65399874771 - 2² = 65399874767 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65399874731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3817350 + ... + 3834443.

It is an arithmetic number, because the mean of its divisors is an integer number (3489218064).

Almost surely, 2^65399874771 is an apocalyptic number.

65399874771 is a deficient number, since it is larger than the sum of its proper divisors (46255103277).

65399874771 is a wasteful number, since it uses less digits than its factorization.

65399874771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7651851.

The product of its digits is 80015040, while the sum is 66.

The spelling of 65399874771 in words is "sixty-five billion, three hundred ninety-nine million, eight hundred seventy-four thousand, seven hundred seventy-one".