65213657 has 8 divisors (see below), whose sum is σ = 67290720. Its totient is φ = 63159840.

The previous prime is 65213651. The next prime is 65213699. The reversal of 65213657 is 75631256.

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

It is a cyclic number.

It is not a de Polignac number, because 65213657 - 2⁴ = 65213641 is a prime.

It is a super-3 number, since 3×65213657³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65213651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23 + ... + 11420.

It is an arithmetic number, because the mean of its divisors is an integer number (8411340).

Almost surely, 2^65213657 is an apocalyptic number.

It is an amenable number.

65213657 is a deficient number, since it is larger than the sum of its proper divisors (2077063).

65213657 is a wasteful number, since it uses less digits than its factorization.

65213657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11623.

The product of its digits is 37800, while the sum is 35.

The square root of 65213657 is about 8075.4973221468. The cubic root of 65213657 is about 402.5126356899.

The spelling of 65213657 in words is "sixty-five million, two hundred thirteen thousand, six hundred fifty-seven".