1660260644 has 12 divisors (see below), whose sum is σ = 3320521344. Its totient is φ = 711540264.

The previous prime is 1660260617. The next prime is 1660260689. The reversal of 1660260644 is 4460620661.

1660260644 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29647484 + ... + 29647539.

It is an arithmetic number, because the mean of its divisors is an integer number (276710112).

Almost surely, 2^1660260644 is an apocalyptic number.

1660260644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1660260644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1660260644 is a wasteful number, since it uses less digits than its factorization.

1660260644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59295034 (or 59295032 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 1660260644 is about 40746.2960770669. The cubic root of 1660260644 is about 1184.1101151924.

The spelling of 1660260644 in words is "one billion, six hundred sixty million, two hundred sixty thousand, six hundred forty-four".