661256246 has 16 divisors (see below), whose sum is σ = 1134895776. Its totient is φ = 283067136.

The previous prime is 661256201. The next prime is 661256263. The reversal of 661256246 is 642652166.

It is a congruent number.

It is an unprimeable number.

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, 14651 + ... + 39206.

It is an arithmetic number, because the mean of its divisors is an integer number (70930986).

Almost surely, 2^661256246 is an apocalyptic number.

661256246 is a deficient number, since it is larger than the sum of its proper divisors (473639530).

661256246 is a wasteful number, since it uses less digits than its factorization.

661256246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54743.

The product of its digits is 103680, while the sum is 38.

The square root of 661256246 is about 25714.9031886181. The cubic root of 661256246 is about 871.2108238510.

The spelling of 661256246 in words is "six hundred sixty-one million, two hundred fifty-six thousand, two hundred forty-six".