64660001 has 8 divisors (see below), whose sum is σ = 74615424. Its totient is φ = 54884160.

The previous prime is 64659997. The next prime is 64660007. The reversal of 64660001 is 10006646.

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 64660001 - 2² = 64659997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64660007) 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, 44120 + ... + 45561.

It is an arithmetic number, because the mean of its divisors is an integer number (9326928).

Almost surely, 2^64660001 is an apocalyptic number.

It is an amenable number.

64660001 is a deficient number, since it is larger than the sum of its proper divisors (9955423).

64660001 is a wasteful number, since it uses less digits than its factorization.

64660001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89791.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 64660001 is about 8041.1442593701. The cubic root of 64660001 is about 401.3703024011.

Adding to 64660001 its reverse (10006646), we get a palindrome (74666647).

The spelling of 64660001 in words is "sixty-four million, six hundred sixty thousand, one".