1664889100974 has 24 divisors (see below), whose sum is σ = 3935192420952. Its totient is φ = 504511848720.

The previous prime is 1664889100939. The next prime is 1664889100981. The reversal of 1664889100974 is 4790019884661.

1664889100974 is a `hidden beast` number, since 1 + 66 + 488 + 9 + 1 + 0 + 0 + 97 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4204265209 + ... + 4204265604.

It is an arithmetic number, because the mean of its divisors is an integer number (163966350873).

Almost surely, 2^{1664889100974} is an apocalyptic number.

1664889100974 is an abundant number, since it is smaller than the sum of its proper divisors (2270303319978).

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

1664889100974 is a wasteful number, since it uses less digits than its factorization.

1664889100974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8408530832 (or 8408530829 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 1664889100974 in words is "one trillion, six hundred sixty-four billion, eight hundred eighty-nine million, one hundred thousand, nine hundred seventy-four".