64690571 has 8 divisors (see below), whose sum is σ = 70647600. Its totient is φ = 58746240.

The previous prime is 64690547. The next prime is 64690597. The reversal of 64690571 is 17509646.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64690571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64690501) 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, 9815 + ... + 15023.

It is an arithmetic number, because the mean of its divisors is an integer number (8830950).

Almost surely, 2^64690571 is an apocalyptic number.

64690571 is a deficient number, since it is larger than the sum of its proper divisors (5957029).

64690571 is a wasteful number, since it uses less digits than its factorization.

64690571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6349.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 64690571 is about 8043.0448836246. The cubic root of 64690571 is about 401.4335458118.

The spelling of 64690571 in words is "sixty-four million, six hundred ninety thousand, five hundred seventy-one".