666666700036 has 6 divisors (see below), whose sum is σ = 1166666725070. Its totient is φ = 333333350016.

The previous prime is 666666700033. The next prime is 666666700067. The reversal of 666666700036 is 630007666666.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 382844137536 + 283822562500 = 618744^2 + 532750^2 .

It is not an unprimeable number, because it can be changed into a prime (666666700033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83333337501 + ... + 83333337508.

Almost surely, 2^666666700036 is an apocalyptic number.

It is an amenable number.

666666700036 is a deficient number, since it is larger than the sum of its proper divisors (500000025034).

666666700036 is a wasteful number, since it uses less digits than its factorization.

666666700036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166666675013 (or 166666675011 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 52.

The spelling of 666666700036 in words is "six hundred sixty-six billion, six hundred sixty-six million, seven hundred thousand, thirty-six".