665946609700 has 36 divisors (see below), whose sum is σ = 1491720412672. Its totient is φ = 257785783200.

The previous prime is 665946609673. The next prime is 665946609709. The reversal of 665946609700 is 7906649566.

It is not an unprimeable number, because it can be changed into a prime (665946609709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107407644 + ... + 107413843.

Almost surely, 2^665946609700 is an apocalyptic number.

It is an amenable number.

665946609700 is an abundant number, since it is smaller than the sum of its proper divisors (825773802972).

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

665946609700 is a wasteful number, since it uses less digits than its factorization.

665946609700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214821532 (or 214821525 counting only the distinct ones).

The product of its (nonzero) digits is 14696640, while the sum is 58.

The spelling of 665946609700 in words is "six hundred sixty-five billion, nine hundred forty-six million, six hundred nine thousand, seven hundred".