3666031686 has 24 divisors (see below), whose sum is σ = 8288420400. Its totient is φ = 1168879536.

The previous prime is 3666031673. The next prime is 3666031777. The reversal of 3666031686 is 6861306663.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4427161 + ... + 4427988.

It is an arithmetic number, because the mean of its divisors is an integer number (345350850).

Almost surely, 2^3666031686 is an apocalyptic number.

3666031686 is an abundant number, since it is smaller than the sum of its proper divisors (4622388714).

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

3666031686 is a wasteful number, since it uses less digits than its factorization.

3666031686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8855180 (or 8855177 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The square root of 3666031686 is about 60547.7636746395. The cubic root of 3666031686 is about 1541.9326505934.

The spelling of 3666031686 in words is "three billion, six hundred sixty-six million, thirty-one thousand, six hundred eighty-six".