660544944 has 20 divisors (see below), whose sum is σ = 1706407896. Its totient is φ = 220181632.

The previous prime is 660544933. The next prime is 660544961. The reversal of 660544944 is 449445066.

It is a junction number, because it is equal to n+sod(n) for n = 660544896 and 660544905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6880629 + ... + 6880724.

Almost surely, 2^660544944 is an apocalyptic number.

It is an amenable number.

660544944 is an abundant number, since it is smaller than the sum of its proper divisors (1045862952).

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

660544944 is a wasteful number, since it uses less digits than its factorization.

660544944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13761364 (or 13761358 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

The square root of 660544944 is about 25701.0689271867. The cubic root of 660544944 is about 870.8983295967.

Subtracting from 660544944 its reverse (449445066), we obtain a triangular number (211099878 = T₂₀₅₄₇).

The spelling of 660544944 in words is "six hundred sixty million, five hundred forty-four thousand, nine hundred forty-four".