661122074 has 16 divisors (see below), whose sum is σ = 1036893312. Its totient is φ = 315549168.

The previous prime is 661122071. The next prime is 661122101. The reversal of 661122074 is 470221166.

It is a super-2 number, since 2×661122074² = 874164793460122952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (661122071) 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 7 ways as a sum of consecutive naturals, for example, 8852 + ... + 37424.

It is an arithmetic number, because the mean of its divisors is an integer number (64805832).

Almost surely, 2^661122074 is an apocalyptic number.

661122074 is a deficient number, since it is larger than the sum of its proper divisors (375771238).

661122074 is a wasteful number, since it uses less digits than its factorization.

661122074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29101.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 661122074 is about 25712.2942189140. The cubic root of 661122074 is about 871.1518956083.

It can be divided in two parts, 66112 and 2074, that added together give a palindrome (68186).

The spelling of 661122074 in words is "six hundred sixty-one million, one hundred twenty-two thousand, seventy-four".