1660880990 has 32 divisors (see below), whose sum is σ = 3070172160. Its totient is φ = 646682400.

The previous prime is 1660880989. The next prime is 1660881043. The reversal of 1660880990 is 990880661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41285 + ... + 70895.

It is an arithmetic number, because the mean of its divisors is an integer number (95942880).

Almost surely, 2^1660880990 is an apocalyptic number.

1660880990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1660880990 is a deficient number, since it is larger than the sum of its proper divisors (1409291170).

1660880990 is a wasteful number, since it uses less digits than its factorization.

1660880990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29768.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 1660880990 is about 40753.9076654006. The cubic root of 1660880990 is about 1184.2575752729.

The spelling of 1660880990 in words is "one billion, six hundred sixty million, eight hundred eighty thousand, nine hundred ninety".