1666430944508 has 12 divisors (see below), whose sum is σ = 3181368166872. Its totient is φ = 757468611120.

The previous prime is 1666430944471. The next prime is 1666430944517. The reversal of 1666430944508 is 8054490346661.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 18936715235 + ... + 18936715322.

It is an arithmetic number, because the mean of its divisors is an integer number (265114013906).

Almost surely, 2^{1666430944508} is an apocalyptic number.

It is an amenable number.

1666430944508 is a deficient number, since it is larger than the sum of its proper divisors (1514937222364).

1666430944508 is a wasteful number, since it uses less digits than its factorization.

1666430944508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37873430572 (or 37873430570 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 56.

The spelling of 1666430944508 in words is "one trillion, six hundred sixty-six billion, four hundred thirty million, nine hundred forty-four thousand, five hundred eight".