1665870007974 has 16 divisors (see below), whose sum is σ = 3331756409520. Its totient is φ = 555287270400.

The previous prime is 1665870007961. The next prime is 1665870007999. The reversal of 1665870007974 is 4797000785661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 931542 + ... + 2049270.

It is an arithmetic number, because the mean of its divisors is an integer number (208234775595).

Almost surely, 2^{1665870007974} is an apocalyptic number.

1665870007974 is an abundant number, since it is smaller than the sum of its proper divisors (1665886401546).

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

1665870007974 is a wasteful number, since it uses less digits than its factorization.

1665870007974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366135.

The product of its (nonzero) digits is 17781120, while the sum is 60.

The spelling of 1665870007974 in words is "one trillion, six hundred sixty-five billion, eight hundred seventy million, seven thousand, nine hundred seventy-four".