15910883640666 has 48 divisors (see below), whose sum is σ = 40202427096000. Its totient is φ = 4545966752712.

The previous prime is 15910883640649. The next prime is 15910883640671. The reversal of 15910883640666 is 66604638801951.

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 23 ways as a sum of consecutive naturals, for example, 1288533156 + ... + 1288545503.

It is an arithmetic number, because the mean of its divisors is an integer number (837550564500).

Almost surely, 2^{15910883640666} is an apocalyptic number.

15910883640666 is an abundant number, since it is smaller than the sum of its proper divisors (24291543455334).

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

15910883640666 is a wasteful number, since it uses less digits than its factorization.

15910883640666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577078688 (or 2577078671 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 15910883640666 in words is "fifteen trillion, nine hundred ten billion, eight hundred eighty-three million, six hundred forty thousand, six hundred sixty-six".