1664474274 has 12 divisors (see below), whose sum is σ = 3606360966. Its totient is φ = 554824752.

The previous prime is 1664474269. The next prime is 1664474291. The reversal of 1664474274 is 4724744661.

It is a happy number.

1664474274 is a `hidden beast` number, since 166 + 447 + 42 + 7 + 4 = 666.

1664474274 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1281998025 + 382476249 = 35805^2 + 19557^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46235379 + ... + 46235414.

Almost surely, 2^1664474274 is an apocalyptic number.

1664474274 is an abundant number, since it is smaller than the sum of its proper divisors (1941886692).

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

1664474274 is a wasteful number, since it uses less digits than its factorization.

1664474274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92470801 (or 92470798 counting only the distinct ones).

The product of its digits is 903168, while the sum is 45.

The square root of 1664474274 is about 40797.9689935663. The cubic root of 1664474274 is about 1185.1109995900.

The spelling of 1664474274 in words is "one billion, six hundred sixty-four million, four hundred seventy-four thousand, two hundred seventy-four".