65399272 has 32 divisors (see below), whose sum is σ = 130549320. Its totient is φ = 30607360.

The previous prime is 65399227. The next prime is 65399287. The reversal of 65399272 is 27299356.

It can be written as a sum of positive squares in 4 ways, for example, as 63776196 + 1623076 = 7986^2 + 1274^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25572 + ... + 28012.

Almost surely, 2^65399272 is an apocalyptic number.

It is an amenable number.

65399272 is a deficient number, since it is larger than the sum of its proper divisors (65150048).

65399272 is a wasteful number, since it uses less digits than its factorization.

65399272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2661 (or 2657 counting only the distinct ones).

The product of its digits is 204120, while the sum is 43.

The square root of 65399272 is about 8086.9816371747. The cubic root of 65399272 is about 402.8941591037.

The spelling of 65399272 in words is "sixty-five million, three hundred ninety-nine thousand, two hundred seventy-two".