642066606 has 24 divisors (see below), whose sum is σ = 1436021184. Its totient is φ = 207118080.

The previous prime is 642066589. The next prime is 642066613. The reversal of 642066606 is 606660246.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 574771 + ... + 575886.

It is an arithmetic number, because the mean of its divisors is an integer number (59834216).

Almost surely, 2^642066606 is an apocalyptic number.

642066606 is an abundant number, since it is smaller than the sum of its proper divisors (793954578).

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

642066606 is a wasteful number, since it uses less digits than its factorization.

642066606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150696 (or 1150693 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 642066606 is about 25339.0332491198. The cubic root of 642066606 is about 862.7004559914.

The spelling of 642066606 in words is "six hundred forty-two million, sixty-six thousand, six hundred six".