665710968 has 32 divisors (see below), whose sum is σ = 1792299600. Its totient is φ = 204834048.

The previous prime is 665710967. The next prime is 665711003. The reversal of 665710968 is 869017566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665710967) 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, 1066533 + ... + 1067156.

Almost surely, 2^665710968 is an apocalyptic number.

It is an amenable number.

665710968 is an abundant number, since it is smaller than the sum of its proper divisors (1126588632).

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

665710968 is a wasteful number, since it uses less digits than its factorization.

665710968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133711 (or 2133707 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 665710968 is about 25801.3753121806. The cubic root of 665710968 is about 873.1628252612.

The spelling of 665710968 in words is "six hundred sixty-five million, seven hundred ten thousand, nine hundred sixty-eight".