668063436 has 24 divisors (see below), whose sum is σ = 1559470080. Its totient is φ = 222594192.

The previous prime is 668063419. The next prime is 668063441. The reversal of 668063436 is 634360866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21885 + ... + 42603.

It is an arithmetic number, because the mean of its divisors is an integer number (64977920).

Almost surely, 2^668063436 is an apocalyptic number.

It is an amenable number.

668063436 is an abundant number, since it is smaller than the sum of its proper divisors (891406644).

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

668063436 is a wasteful number, since it uses less digits than its factorization.

668063436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23413 (or 23411 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 42.

The square root of 668063436 is about 25846.9231437709. The cubic root of 668063436 is about 874.1901343521.

The spelling of 668063436 in words is "six hundred sixty-eight million, sixty-three thousand, four hundred thirty-six".