56661105251306 has 4 divisors (see below), whose sum is σ = 84991657876962. Its totient is φ = 28330552625652.

The previous prime is 56661105251213. The next prime is 56661105251389. The reversal of 56661105251306 is 60315250116665.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 52737239485681 + 3923865765625 = 7262041^2 + 1980875^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14165276312825 + ... + 14165276312828.

Almost surely, 2^{56661105251306} is an apocalyptic number.

56661105251306 is a deficient number, since it is larger than the sum of its proper divisors (28330552625656).

56661105251306 is a wasteful number, since it uses less digits than its factorization.

56661105251306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28330552625655.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 56661105251306 in words is "fifty-six trillion, six hundred sixty-one billion, one hundred five million, two hundred fifty-one thousand, three hundred six".