660121042 has 48 divisors (see below), whose sum is σ = 1190336472. Its totient is φ = 273611520.

The previous prime is 660121039. The next prime is 660121043. The reversal of 660121042 is 240121066.

660121042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 437186281 + 222934761 = 20909^2 + 14931^2 .

It is not an unprimeable number, because it can be changed into a prime (660121043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 378292 + ... + 380032.

Almost surely, 2^660121042 is an apocalyptic number.

660121042 is a deficient number, since it is larger than the sum of its proper divisors (530215430).

660121042 is a wasteful number, since it uses less digits than its factorization.

660121042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883 (or 1876 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 660121042 is about 25692.8208260596. The cubic root of 660121042 is about 870.7119912572.

The spelling of 660121042 in words is "six hundred sixty million, one hundred twenty-one thousand, forty-two".