1666740401716 has 96 divisors (see below), whose sum is σ = 3192600096000. Its totient is φ = 756767413248.

The previous prime is 1666740401693. The next prime is 1666740401813. The reversal of 1666740401716 is 6171040476661.

It is a self number, because there is not a number n which added to its sum of digits gives 1666740401716.

It is a congruent number.

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, 975271470 + ... + 975273178.

It is an arithmetic number, because the mean of its divisors is an integer number (33256251000).

Almost surely, 2^{1666740401716} is an apocalyptic number.

It is an amenable number.

1666740401716 is a deficient number, since it is larger than the sum of its proper divisors (1525859694284).

1666740401716 is a wasteful number, since it uses less digits than its factorization.

1666740401716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2761 (or 2759 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 1666740401716 in words is "one trillion, six hundred sixty-six billion, seven hundred forty million, four hundred one thousand, seven hundred sixteen".