2660578974 has 20 divisors (see below), whose sum is σ = 5961668064. Its totient is φ = 886859604.

The previous prime is 2660578957. The next prime is 2660579057. The reversal of 2660578974 is 4798750662.

2660578974 is a `hidden beast` number, since 2 + 6 + 60 + 578 + 9 + 7 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 2660578974.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8211502 + ... + 8211825.

Almost surely, 2^2660578974 is an apocalyptic number.

2660578974 is an abundant number, since it is smaller than the sum of its proper divisors (3301089090).

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

2660578974 is a wasteful number, since it uses less digits than its factorization.

2660578974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16423341 (or 16423332 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The square root of 2660578974 is about 51580.8004396985. The cubic root of 2660578974 is about 1385.6665020959. Note that the first 3 decimals are identical.

The spelling of 2660578974 in words is "two billion, six hundred sixty million, five hundred seventy-eight thousand, nine hundred seventy-four".