880660921 has 4 divisors (see below), whose sum is σ = 1006469632. Its totient is φ = 754852212.

The previous prime is 880660897. The next prime is 880660943. The reversal of 880660921 is 129066088.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 880660921 - 2⁵ = 880660889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (880660021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62904345 + ... + 62904358.

It is an arithmetic number, because the mean of its divisors is an integer number (251617408).

Almost surely, 2^880660921 is an apocalyptic number.

It is an amenable number.

880660921 is a deficient number, since it is larger than the sum of its proper divisors (125808711).

880660921 is a wasteful number, since it uses less digits than its factorization.

880660921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125808710.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 880660921 is about 29675.9316787190. The cubic root of 880660921 is about 958.5238166809.

The spelling of 880660921 in words is "eight hundred eighty million, six hundred sixty thousand, nine hundred twenty-one".