65623501 has 4 divisors (see below), whose sum is σ = 65649600. Its totient is φ = 65597404.

The previous prime is 65623499. The next prime is 65623529. The reversal of 65623501 is 10532656.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65623501 - 2¹ = 65623499 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 65623501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65623561) 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, 8821 + ... + 14458.

It is an arithmetic number, because the mean of its divisors is an integer number (16412400).

Almost surely, 2^65623501 is an apocalyptic number.

It is an amenable number.

65623501 is a deficient number, since it is larger than the sum of its proper divisors (26099).

65623501 is a wasteful number, since it uses less digits than its factorization.

65623501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26098.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 65623501 is about 8100.8333521928. The cubic root of 65623501 is about 403.3540903341.

The spelling of 65623501 in words is "sixty-five million, six hundred twenty-three thousand, five hundred one".