65613507 has 4 divisors (see below), whose sum is σ = 87484680. Its totient is φ = 43742336.

The previous prime is 65613467. The next prime is 65613511. The reversal of 65613507 is 70531656.

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 65613507 - 2¹¹ = 65611459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65613307) 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, 10935582 + ... + 10935587.

It is an arithmetic number, because the mean of its divisors is an integer number (21871170).

Almost surely, 2^65613507 is an apocalyptic number.

65613507 is a deficient number, since it is larger than the sum of its proper divisors (21871173).

65613507 is a wasteful number, since it uses less digits than its factorization.

65613507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21871172.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 65613507 is about 8100.2164785887. The cubic root of 65613507 is about 403.3336132928. Note that the first 3 decimals are identical.

The spelling of 65613507 in words is "sixty-five million, six hundred thirteen thousand, five hundred seven".