666999096 has 64 divisors (see below), whose sum is σ = 1686528000. Its totient is φ = 219811968.

The previous prime is 666999083. The next prime is 666999107. The reversal of 666999096 is 690999666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1369365 + ... + 1369851.

It is an arithmetic number, because the mean of its divisors is an integer number (26352000).

Almost surely, 2^666999096 is an apocalyptic number.

It is an amenable number.

666999096 is an abundant number, since it is smaller than the sum of its proper divisors (1019528904).

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

666999096 is a wasteful number, since it uses less digits than its factorization.

666999096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028 (or 1024 counting only the distinct ones).

The product of its (nonzero) digits is 8503056, while the sum is 60.

The square root of 666999096 is about 25826.3256387741. The cubic root of 666999096 is about 873.7256424941.

The spelling of 666999096 in words is "six hundred sixty-six million, nine hundred ninety-nine thousand, ninety-six".