65624673 has 4 divisors (see below), whose sum is σ = 87499568. Its totient is φ = 43749780.

The previous prime is 65624623. The next prime is 65624677. The reversal of 65624673 is 37642656.

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 not a de Polignac number, because 65624673 - 2⁹ = 65624161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65624677) 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, 10937443 + ... + 10937448.

It is an arithmetic number, because the mean of its divisors is an integer number (21874892).

Almost surely, 2^65624673 is an apocalyptic number.

It is an amenable number.

65624673 is a deficient number, since it is larger than the sum of its proper divisors (21874895).

65624673 is a wasteful number, since it uses less digits than its factorization.

65624673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21874894.

The product of its digits is 181440, while the sum is 39.

The square root of 65624673 is about 8100.9056901065. The cubic root of 65624673 is about 403.3564915480.

The spelling of 65624673 in words is "sixty-five million, six hundred twenty-four thousand, six hundred seventy-three".