668337492 has 24 divisors (see below), whose sum is σ = 1559992000. Its totient is φ = 222702336.

The previous prime is 668337487. The next prime is 668337499. The reversal of 668337492 is 294733866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668337499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34884 + ... + 50532.

Almost surely, 2^668337492 is an apocalyptic number.

It is an amenable number.

668337492 is an abundant number, since it is smaller than the sum of its proper divisors (891654508).

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

668337492 is a wasteful number, since it uses less digits than its factorization.

668337492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19215 (or 19213 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 48.

The square root of 668337492 is about 25852.2241209533. The cubic root of 668337492 is about 874.3096560851.

The spelling of 668337492 in words is "six hundred sixty-eight million, three hundred thirty-seven thousand, four hundred ninety-two".