661055230 has 16 divisors (see below), whose sum is σ = 1298072304. Its totient is φ = 240383680.

The previous prime is 661055221. The next prime is 661055279. The reversal of 661055230 is 32550166.

It is a super-2 number, since 2×661055230² = 873988034220705800, which contains 22 as substring.

It is a congruent 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, 3004687 + ... + 3004906.

It is an arithmetic number, because the mean of its divisors is an integer number (81129519).

Almost surely, 2^661055230 is an apocalyptic number.

661055230 is a deficient number, since it is larger than the sum of its proper divisors (637017074).

661055230 is a wasteful number, since it uses less digits than its factorization.

661055230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6009611.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 661055230 is about 25710.9943409429. The cubic root of 661055230 is about 871.1225347978.

The spelling of 661055230 in words is "six hundred sixty-one million, fifty-five thousand, two hundred thirty".