64660730 has 32 divisors (see below), whose sum is σ = 120960000. Its totient is φ = 24860160.

The previous prime is 64660721. The next prime is 64660753. The reversal of 64660730 is 3706646.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51146 + ... + 52394.

It is an arithmetic number, because the mean of its divisors is an integer number (3780000).

Almost surely, 2^64660730 is an apocalyptic number.

64660730 is a deficient number, since it is larger than the sum of its proper divisors (56299270).

64660730 is a wasteful number, since it uses less digits than its factorization.

64660730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 64660730 is about 8041.1895886119. The cubic root of 64660730 is about 401.3718107929.

The spelling of 64660730 in words is "sixty-four million, six hundred sixty thousand, seven hundred thirty".