65220872 has 8 divisors (see below), whose sum is σ = 122289150. Its totient is φ = 32610432.

The previous prime is 65220853. The next prime is 65220877. The reversal of 65220872 is 27802256.

It can be written as a sum of positive squares in only one way, i.e., 52504516 + 12716356 = 7246^2 + 3566^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (65220877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4076297 + ... + 4076312.

Almost surely, 2^65220872 is an apocalyptic number.

It is an amenable number.

65220872 is a deficient number, since it is larger than the sum of its proper divisors (57068278).

65220872 is a wasteful number, since it uses less digits than its factorization.

65220872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8152615 (or 8152611 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 65220872 is about 8075.9440315049. The cubic root of 65220872 is about 402.5274793168.

The spelling of 65220872 in words is "sixty-five million, two hundred twenty thousand, eight hundred seventy-two".