660877038 has 48 divisors (see below), whose sum is σ = 1510563600. Its totient is φ = 208241280.

The previous prime is 660877033. The next prime is 660877039. The reversal of 660877038 is 830778066.

660877038 is a `hidden beast` number, since 6 + 608 + 7 + 7 + 0 + 38 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 660876984 and 660877002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660877033) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 176328 + ... + 180036.

It is an arithmetic number, because the mean of its divisors is an integer number (31470075).

Almost surely, 2^660877038 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660877038, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (755281800).

660877038 is an abundant number, since it is smaller than the sum of its proper divisors (849686562).

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

660877038 is a wasteful number, since it uses less digits than its factorization.

660877038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4257 (or 4254 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 660877038 is about 25707.5288193945. The cubic root of 660877038 is about 871.0442553998.

The spelling of 660877038 in words is "six hundred sixty million, eight hundred seventy-seven thousand, thirty-eight".