65731730 has 8 divisors (see below), whose sum is σ = 118317132. Its totient is φ = 26292688.

The previous prime is 65731727. The next prime is 65731753. The reversal of 65731730 is 3713756.

It can be written as a sum of positive squares in 2 ways, for example, as 65723449 + 8281 = 8107^2 + 91^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3286577 + ... + 3286596.

Almost surely, 2^65731730 is an apocalyptic number.

65731730 is a deficient number, since it is larger than the sum of its proper divisors (52585402).

65731730 is a wasteful number, since it uses less digits than its factorization.

65731730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6573180.

The product of its (nonzero) digits is 13230, while the sum is 32.

The square root of 65731730 is about 8107.5107153799. The cubic root of 65731730 is about 403.5757113091.

The spelling of 65731730 in words is "sixty-five million, seven hundred thirty-one thousand, seven hundred thirty".