64669859 has 8 divisors (see below), whose sum is σ = 67744512. Its totient is φ = 61617160.

The previous prime is 64669831. The next prime is 64669867. The reversal of 64669859 is 95896646.

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-64669859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64669859.

It is not an unprimeable number, because it can be changed into a prime (64669879) 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, 704 + ... + 11394.

It is an arithmetic number, because the mean of its divisors is an integer number (8468064).

Almost surely, 2^64669859 is an apocalyptic number.

64669859 is a deficient number, since it is larger than the sum of its proper divisors (3074653).

64669859 is a wasteful number, since it uses less digits than its factorization.

64669859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10977.

The product of its digits is 2799360, while the sum is 53.

The square root of 64669859 is about 8041.7572084713. The cubic root of 64669859 is about 401.3906988715.

The spelling of 64669859 in words is "sixty-four million, six hundred sixty-nine thousand, eight hundred fifty-nine".