3661664663792 has 20 divisors (see below), whose sum is σ = 7096164175056. Its totient is φ = 1830396489600.

The previous prime is 3661664663771. The next prime is 3661664663807. The reversal of 3661664663792 is 2973664661663.

It is a super-2 number, since 2×3661664663792² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 27170828 + ... + 27305259.

Almost surely, 2^{3661664663792} is an apocalyptic number.

It is an amenable number.

3661664663792 is a deficient number, since it is larger than the sum of its proper divisors (3434499511264).

3661664663792 is a wasteful number, since it uses less digits than its factorization.

3661664663792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54480296 (or 54480290 counting only the distinct ones).

The product of its digits is 211631616, while the sum is 65.

The spelling of 3661664663792 in words is "three trillion, six hundred sixty-one billion, six hundred sixty-four million, six hundred sixty-three thousand, seven hundred ninety-two".