660880770 has 32 divisors (see below), whose sum is σ = 1730306880. Its totient is φ = 160213440.

The previous prime is 660880769. The next prime is 660880789. The reversal of 660880770 is 77088066.

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, 1001005 + ... + 1001664.

It is an arithmetic number, because the mean of its divisors is an integer number (54072090).

Almost surely, 2^660880770 is an apocalyptic number.

660880770 is an abundant number, since it is smaller than the sum of its proper divisors (1069426110).

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

660880770 is a wasteful number, since it uses less digits than its factorization.

660880770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2002690.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 660880770 is about 25707.6014050319. The cubic root of 660880770 is about 871.0458950044.

It can be divided in two parts, 6608 and 80770, that added together give a palindrome (87378).

The spelling of 660880770 in words is "six hundred sixty million, eight hundred eighty thousand, seven hundred seventy".