1660622868 has 36 divisors (see below), whose sum is σ = 4199077428. Its totient is φ = 553357440.

The previous prime is 1660622867. The next prime is 1660622879. The reversal of 1660622868 is 8682260661.

1660622868 is a `hidden beast` number, since 16 + 6 + 0 + 622 + 8 + 6 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 516289284 + 1144333584 = 22722^2 + 33828^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660622861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143208 + ... + 154368.

Almost surely, 2^1660622868 is an apocalyptic number.

1660622868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1660622868 is an abundant number, since it is smaller than the sum of its proper divisors (2538454560).

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

1660622868 is a wasteful number, since it uses less digits than its factorization.

1660622868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15304 (or 15299 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 1660622868 is about 40750.7407049246. The cubic root of 1660622868 is about 1184.1962225385.

The spelling of 1660622868 in words is "one billion, six hundred sixty million, six hundred twenty-two thousand, eight hundred sixty-eight".