64190668 has 6 divisors (see below), whose sum is σ = 112333676. Its totient is φ = 32095332.

The previous prime is 64190647. The next prime is 64190669. The reversal of 64190668 is 86609146.

It is a self number, because there is not a number n which added to its sum of digits gives 64190668.

It is not an unprimeable number, because it can be changed into a prime (64190669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8023830 + ... + 8023837.

Almost surely, 2^64190668 is an apocalyptic number.

It is an amenable number.

64190668 is a deficient number, since it is larger than the sum of its proper divisors (48143008).

64190668 is a wasteful number, since it uses less digits than its factorization.

64190668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16047671 (or 16047669 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 64190668 is about 8011.9078876382. The cubic root of 64190668 is about 400.3968311823.

The spelling of 64190668 in words is "sixty-four million, one hundred ninety thousand, six hundred sixty-eight".