65960639 has 4 divisors (see below), whose sum is σ = 66068856. Its totient is φ = 65852424.

The previous prime is 65960627. The next prime is 65960641. The reversal of 65960639 is 93606956.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65960639 - 2⁸ = 65960383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65960639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65965639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53189 + ... + 54414.

It is an arithmetic number, because the mean of its divisors is an integer number (16517214).

Almost surely, 2^65960639 is an apocalyptic number.

65960639 is a deficient number, since it is larger than the sum of its proper divisors (108217).

65960639 is a wasteful number, since it uses less digits than its factorization.

65960639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108216.

The product of its (nonzero) digits is 262440, while the sum is 44.

The square root of 65960639 is about 8121.6155412578. The cubic root of 65960639 is about 404.0436490923.

The spelling of 65960639 in words is "sixty-five million, nine hundred sixty thousand, six hundred thirty-nine".