668901342 has 16 divisors (see below), whose sum is σ = 1340787600. Its totient is φ = 222469632.

The previous prime is 668901271. The next prime is 668901361. The reversal of 668901342 is 243109866.

It is a self number, because there is not a number n which added to its sum of digits gives 668901342.

It is a congruent number.

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, 121453 + ... + 126840.

It is an arithmetic number, because the mean of its divisors is an integer number (83799225).

Almost surely, 2^668901342 is an apocalyptic number.

668901342 is an abundant number, since it is smaller than the sum of its proper divisors (671886258).

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

668901342 is a wasteful number, since it uses less digits than its factorization.

668901342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248747.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 668901342 is about 25863.1270731132. The cubic root of 668901342 is about 874.5554605050. Note that the first 3 decimals are identical.

The spelling of 668901342 in words is "six hundred sixty-eight million, nine hundred one thousand, three hundred forty-two".