561166690 has 32 divisors (see below), whose sum is σ = 1155285504. Its totient is φ = 192252480.

The previous prime is 561166687. The next prime is 561166709. The reversal of 561166690 is 96661165.

It is a super-2 number, since 2×561166690² = 629816107931112200, which contains 22 as substring.

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, 129255 + ... + 133525.

It is an arithmetic number, because the mean of its divisors is an integer number (36102672).

Almost surely, 2^561166690 is an apocalyptic number.

561166690 is an abundant number, since it is smaller than the sum of its proper divisors (594118814).

561166690 is a wasteful number, since it uses less digits than its factorization.

561166690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6162.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 561166690 is about 23688.9571319634. The cubic root of 561166690 is about 824.8290750889.

The spelling of 561166690 in words is "five hundred sixty-one million, one hundred sixty-six thousand, six hundred ninety".