64664806 has 4 divisors (see below), whose sum is σ = 96997212. Its totient is φ = 32332402.

The previous prime is 64664801. The next prime is 64664813. The reversal of 64664806 is 60846646.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64664801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16166200 + ... + 16166203.

It is an arithmetic number, because the mean of its divisors is an integer number (24249303).

Almost surely, 2^64664806 is an apocalyptic number.

64664806 is a deficient number, since it is larger than the sum of its proper divisors (32332406).

64664806 is a wasteful number, since it uses less digits than its factorization.

64664806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32332405.

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 64664806 is about 8041.4430297056. The cubic root of 64664806 is about 401.3802443359.

The spelling of 64664806 in words is "sixty-four million, six hundred sixty-four thousand, eight hundred six".