660557052 has 48 divisors (see below), whose sum is σ = 1767808000. Its totient is φ = 213081840.

The previous prime is 660557047. The next prime is 660557057. The reversal of 660557052 is 250755066.

It is an interprime number because it is at equal distance from previous prime (660557047) and next prime (660557057).

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

It is a junction number, because it is equal to n+sod(n) for n = 660556998 and 660557016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660557057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95302 + ... + 101997.

Almost surely, 2^660557052 is an apocalyptic number.

660557052 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

660557052 is an abundant number, since it is smaller than the sum of its proper divisors (1107250948).

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

660557052 is a wasteful number, since it uses less digits than its factorization.

660557052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197343 (or 197335 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 660557052 is about 25701.3044805123. The cubic root of 660557052 is about 870.9036508458.

The spelling of 660557052 in words is "six hundred sixty million, five hundred fifty-seven thousand, fifty-two".