666703669700 has 36 divisors (see below), whose sum is σ = 1485848240772. Its totient is φ = 259473859200.

The previous prime is 666703669693. The next prime is 666703669727. The reversal of 666703669700 is 7966307666.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 34414702144 + 632288967556 = 185512^2 + 795166^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90091391 + ... + 90098790.

Almost surely, 2^666703669700 is an apocalyptic number.

It is an amenable number.

666703669700 is an abundant number, since it is smaller than the sum of its proper divisors (819144571072).

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

666703669700 is a wasteful number, since it uses less digits than its factorization.

666703669700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180190232 (or 180190225 counting only the distinct ones).

The product of its (nonzero) digits is 10287648, while the sum is 56.

The spelling of 666703669700 in words is "six hundred sixty-six billion, seven hundred three million, six hundred sixty-nine thousand, seven hundred".