1664300840 has 32 divisors (see below), whose sum is σ = 3746100960. Its totient is φ = 665467200.

The previous prime is 1664300831. The next prime is 1664300857. The reversal of 1664300840 is 480034661.

It is a junction number, because it is equal to n+sod(n) for n = 1664300797 and 1664300806.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126995 + ... + 139485.

It is an arithmetic number, because the mean of its divisors is an integer number (117065655).

Almost surely, 2^1664300840 is an apocalyptic number.

1664300840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1664300840 is an abundant number, since it is smaller than the sum of its proper divisors (2081800120).

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

1664300840 is a wasteful number, since it uses less digits than its factorization.

1664300840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15833 (or 15829 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 1664300840 is about 40795.8434157207. The cubic root of 1664300840 is about 1185.0698363063.

The spelling of 1664300840 in words is "one billion, six hundred sixty-four million, three hundred thousand, eight hundred forty".