1664046256 has 20 divisors (see below), whose sum is σ = 3229139304. Its totient is φ = 830720000.

The previous prime is 1664046253. The next prime is 1664046257. The reversal of 1664046256 is 6526404661.

It is not an unprimeable number, because it can be changed into a prime (1664046253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70870 + ... + 91381.

Almost surely, 2^1664046256 is an apocalyptic number.

1664046256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1664046256 is a deficient number, since it is larger than the sum of its proper divisors (1565093048).

1664046256 is a wasteful number, since it uses less digits than its factorization.

1664046256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162900 (or 162894 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 1664046256 is about 40792.7230765488. The cubic root of 1664046256 is about 1185.0094074870.

The spelling of 1664046256 in words is "one billion, six hundred sixty-four million, forty-six thousand, two hundred fifty-six".