65399769 has 12 divisors (see below), whose sum is σ = 94641456. Its totient is φ = 43519032.

The previous prime is 65399759. The next prime is 65399773. The reversal of 65399769 is 96799356.

It is not a de Polignac number, because 65399769 - 2⁷ = 65399641 is a prime.

It is a super-2 number, since 2×65399769² = 8554259570506722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65399759) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1387 + ... + 11520.

It is an arithmetic number, because the mean of its divisors is an integer number (7886788).

Almost surely, 2^65399769 is an apocalyptic number.

It is an amenable number.

65399769 is a deficient number, since it is larger than the sum of its proper divisors (29241687).

65399769 is a wasteful number, since it uses less digits than its factorization.

65399769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13476 (or 13473 counting only the distinct ones).

The product of its digits is 2755620, while the sum is 54.

The square root of 65399769 is about 8087.0123655155. The cubic root of 65399769 is about 402.8951796955.

The spelling of 65399769 in words is "sixty-five million, three hundred ninety-nine thousand, seven hundred sixty-nine".