1660616580 has 48 divisors (see below), whose sum is σ = 5313974400. Its totient is φ = 379569408.

The previous prime is 1660616579. The next prime is 1660616591. The reversal of 1660616580 is 856160661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1976505 + ... + 1977344.

It is an arithmetic number, because the mean of its divisors is an integer number (110707800).

Almost surely, 2^1660616580 is an apocalyptic number.

1660616580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1660616580 is an abundant number, since it is smaller than the sum of its proper divisors (3653357820).

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

1660616580 is a wasteful number, since it uses less digits than its factorization.

1660616580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3953868 (or 3953866 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 1660616580 is about 40750.6635528797. The cubic root of 1660616580 is about 1184.1947278714.

The spelling of 1660616580 in words is "one billion, six hundred sixty million, six hundred sixteen thousand, five hundred eighty".