660887626 has 8 divisors (see below), whose sum is σ = 1132950240. Its totient is φ = 283237548.

The previous prime is 660887551. The next prime is 660887627. The reversal of 660887626 is 626788066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 660887626.

It is not an unprimeable number, because it can be changed into a prime (660887627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23603116 + ... + 23603143.

It is an arithmetic number, because the mean of its divisors is an integer number (141618780).

Almost surely, 2^660887626 is an apocalyptic number.

660887626 is a deficient number, since it is larger than the sum of its proper divisors (472062614).

660887626 is a wasteful number, since it uses less digits than its factorization.

660887626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47206268.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 660887626 is about 25707.7347504598. The cubic root of 660887626 is about 871.0489070807.

The spelling of 660887626 in words is "six hundred sixty million, eight hundred eighty-seven thousand, six hundred twenty-six".