1664766474 has 24 divisors (see below), whose sum is σ = 3873130848. Its totient is φ = 475647480.

The previous prime is 1664766451. The next prime is 1664766503. The reversal of 1664766474 is 4746674661.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2830942 + ... + 2831529.

It is an arithmetic number, because the mean of its divisors is an integer number (161380452).

Almost surely, 2^1664766474 is an apocalyptic number.

1664766474 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1664766474 is an abundant number, since it is smaller than the sum of its proper divisors (2208364374).

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

1664766474 is a wasteful number, since it uses less digits than its factorization.

1664766474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5662490 (or 5662483 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 51.

The square root of 1664766474 is about 40801.5498970321. The cubic root of 1664766474 is about 1185.1803446434.

The spelling of 1664766474 in words is "one billion, six hundred sixty-four million, seven hundred sixty-six thousand, four hundred seventy-four".