561157066 has 8 divisors (see below), whose sum is σ = 852390720. Its totient is φ = 277026828.

The previous prime is 561157043. The next prime is 561157067. The reversal of 561157066 is 660751165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (561157067) 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, 1775656 + ... + 1775971.

It is an arithmetic number, because the mean of its divisors is an integer number (106548840).

Almost surely, 2^561157066 is an apocalyptic number.

561157066 is a deficient number, since it is larger than the sum of its proper divisors (291233654).

561157066 is a wasteful number, since it uses less digits than its factorization.

561157066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3551708.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 561157066 is about 23688.7539984694. The cubic root of 561157066 is about 824.8243597933.

The spelling of 561157066 in words is "five hundred sixty-one million, one hundred fifty-seven thousand, sixty-six".