3679180821666 has 64 divisors (see below), whose sum is σ = 9344341094400. Its totient is φ = 1051150668048.

The previous prime is 3679180821653. The next prime is 3679180821671. The reversal of 3679180821666 is 6661280819763.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9480145 + ... + 9860603.

It is an arithmetic number, because the mean of its divisors is an integer number (146005329600).

Almost surely, 2^{3679180821666} is an apocalyptic number.

3679180821666 is an abundant number, since it is smaller than the sum of its proper divisors (5665160272734).

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

3679180821666 is a wasteful number, since it uses less digits than its factorization.

3679180821666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406060 (or 406054 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 3679180821666 in words is "three trillion, six hundred seventy-nine billion, one hundred eighty million, eight hundred twenty-one thousand, six hundred sixty-six".