64406670 has 64 divisors (see below), whose sum is σ = 162362880. Its totient is φ = 16320128.

The previous prime is 64406669. The next prime is 64406681. The reversal of 64406670 is 7660446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185437 + ... + 185783.

It is an arithmetic number, because the mean of its divisors is an integer number (2536920).

Almost surely, 2^64406670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64406670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81181440).

64406670 is an abundant number, since it is smaller than the sum of its proper divisors (97956210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64406670 is a wasteful number, since it uses less digits than its factorization.

64406670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 64406670 is about 8025.3766266762. The cubic root of 64406670 is about 400.8454409816.

The spelling of 64406670 in words is "sixty-four million, four hundred six thousand, six hundred seventy".