64566642 has 16 divisors (see below), whose sum is σ = 147580992. Its totient is φ = 18447600.

The previous prime is 64566611. The next prime is 64566653. The reversal of 64566642 is 24666546.

It is a self number, because there is not a number n which added to its sum of digits gives 64566642.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768609 + ... + 768692.

It is an arithmetic number, because the mean of its divisors is an integer number (9223812).

Almost surely, 2^64566642 is an apocalyptic number.

64566642 is an abundant number, since it is smaller than the sum of its proper divisors (83014350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64566642 is a wasteful number, since it uses less digits than its factorization.

64566642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537313.

The product of its digits is 207360, while the sum is 39.

The square root of 64566642 is about 8035.3370806706. The cubic root of 64566642 is about 401.1770372278.

The spelling of 64566642 in words is "sixty-four million, five hundred sixty-six thousand, six hundred forty-two".