660157560 has 64 divisors (see below), whose sum is σ = 2200528800. Its totient is φ = 176041728.

The previous prime is 660157501. The next prime is 660157571. The reversal of 660157560 is 65751066.

It is a happy number.

660157560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304549 + ... + 306708.

Almost surely, 2^660157560 is an apocalyptic number.

660157560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

660157560 is an abundant number, since it is smaller than the sum of its proper divisors (1540371240).

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

660157560 is a wasteful number, since it uses less digits than its factorization.

660157560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611277 (or 611267 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 660157560 is about 25693.5314816784. The cubic root of 660157560 is about 870.7280469360.

The spelling of 660157560 in words is "six hundred sixty million, one hundred fifty-seven thousand, five hundred sixty".