1660998860 has 24 divisors (see below), whose sum is σ = 3498462240. Its totient is φ = 662425344.

The previous prime is 1660998827. The next prime is 1660998863. The reversal of 1660998860 is 688990661.

It is not an unprimeable number, because it can be changed into a prime (1660998863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116480 + ... + 129959.

It is an arithmetic number, because the mean of its divisors is an integer number (145769260).

Almost surely, 2^1660998860 is an apocalyptic number.

1660998860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1660998860 is an abundant number, since it is smaller than the sum of its proper divisors (1837463380).

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

1660998860 is a wasteful number, since it uses less digits than its factorization.

1660998860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246785 (or 246783 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 53.

The square root of 1660998860 is about 40755.3537587395. The cubic root of 1660998860 is about 1184.2855895495.

The spelling of 1660998860 in words is "one billion, six hundred sixty million, nine hundred ninety-eight thousand, eight hundred sixty".