1616666660 has 48 divisors (see below), whose sum is σ = 3901497600. Its totient is φ = 551214720.

The previous prime is 1616666627. The next prime is 1616666669. The reversal of 1616666660 is 666666161.

It is a super-2 number, since 2×1616666660² = 5227222179111111200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1616666669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6560 + ... + 57239.

It is an arithmetic number, because the mean of its divisors is an integer number (81281200).

Almost surely, 2^1616666660 is an apocalyptic number.

1616666660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1616666660 is an abundant number, since it is smaller than the sum of its proper divisors (2284830940).

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

1616666660 is a wasteful number, since it uses less digits than its factorization.

1616666660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63996 (or 63994 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 1616666660 is about 40207.7935231467. The cubic root of 1616666660 is about 1173.6542092952.

The spelling of 1616666660 in words is "one billion, six hundred sixteen million, six hundred sixty-six thousand, six hundred sixty".