64664701 has 4 divisors (see below), whose sum is σ = 65269152. Its totient is φ = 64060252.

The previous prime is 64664687. The next prime is 64664711. The reversal of 64664701 is 10746646.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64664701 - 2⁷ = 64664573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64664711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302065 + ... + 302278.

It is an arithmetic number, because the mean of its divisors is an integer number (16317288).

Almost surely, 2^64664701 is an apocalyptic number.

It is an amenable number.

64664701 is a deficient number, since it is larger than the sum of its proper divisors (604451).

64664701 is a wasteful number, since it uses less digits than its factorization.

64664701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604450.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 64664701 is about 8041.4365010239. The cubic root of 64664701 is about 401.3800270876.

The spelling of 64664701 in words is "sixty-four million, six hundred sixty-four thousand, seven hundred one".