1666702627724 has 12 divisors (see below), whose sum is σ = 2936304966000. Its totient is φ = 827758351728.

The previous prime is 1666702627669. The next prime is 1666702627747. The reversal of 1666702627724 is 4277262076661.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1666702627724.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1398239864 + ... + 1398241055.

It is an arithmetic number, because the mean of its divisors is an integer number (244692080500).

Almost surely, 2^{1666702627724} is an apocalyptic number.

It is an amenable number.

1666702627724 is a deficient number, since it is larger than the sum of its proper divisors (1269602338276).

1666702627724 is a wasteful number, since it uses less digits than its factorization.

1666702627724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2796481072 (or 2796481070 counting only the distinct ones).

The product of its (nonzero) digits is 14224896, while the sum is 56.

The spelling of 1666702627724 in words is "one trillion, six hundred sixty-six billion, seven hundred two million, six hundred twenty-seven thousand, seven hundred twenty-four".