64566663 has 32 divisors (see below), whose sum is σ = 106329600. Its totient is φ = 34715520.

The previous prime is 64566661. The next prime is 64566679. The reversal of 64566663 is 36666546.

It is a happy number.

It is not a de Polignac number, because 64566663 - 2¹ = 64566661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64566661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15648 + ... + 19338.

It is an arithmetic number, because the mean of its divisors is an integer number (3322800).

Almost surely, 2^64566663 is an apocalyptic number.

64566663 is a deficient number, since it is larger than the sum of its proper divisors (41762937).

64566663 is a wasteful number, since it uses less digits than its factorization.

64566663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3732 (or 3718 counting only the distinct ones).

The product of its digits is 466560, while the sum is 42.

The square root of 64566663 is about 8035.3383873985. The cubic root of 64566663 is about 401.1770807215.

The spelling of 64566663 in words is "sixty-four million, five hundred sixty-six thousand, six hundred sixty-three".