64653670 has 32 divisors (see below), whose sum is σ = 119771136. Its totient is φ = 25116000.

The previous prime is 64653647. The next prime is 64653671. The reversal of 64653670 is 7635646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64653671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70515 + ... + 71425.

It is an arithmetic number, because the mean of its divisors is an integer number (3742848).

Almost surely, 2^64653670 is an apocalyptic number.

64653670 is a deficient number, since it is larger than the sum of its proper divisors (55117466).

64653670 is a wasteful number, since it uses less digits than its factorization.

64653670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116.

The product of its (nonzero) digits is 90720, while the sum is 37.

The square root of 64653670 is about 8040.7505868544. The cubic root of 64653670 is about 401.3572022966.

The spelling of 64653670 in words is "sixty-four million, six hundred fifty-three thousand, six hundred seventy".