661122938 has 16 divisors (see below), whose sum is σ = 1139111424. Its totient is φ = 281898960.

The previous prime is 661122929. The next prime is 661122989. The reversal of 661122938 is 839221166.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117098 + ... + 122613.

It is an arithmetic number, because the mean of its divisors is an integer number (71194464).

Almost surely, 2^661122938 is an apocalyptic number.

661122938 is a deficient number, since it is larger than the sum of its proper divisors (477988486).

661122938 is a wasteful number, since it uses less digits than its factorization.

661122938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239917.

The product of its digits is 31104, while the sum is 38.

The square root of 661122938 is about 25712.3110202098. The cubic root of 661122938 is about 871.1522751020.

The spelling of 661122938 in words is "six hundred sixty-one million, one hundred twenty-two thousand, nine hundred thirty-eight".