866377470436 has 27 divisors (see below), whose sum is σ = 1521774852507. Its totient is φ = 431590561920.

The previous prime is 866377470419. The next prime is 866377470443. The reversal of 866377470436 is 634074773668.

The square root of 866377470436 is 930794.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 68471188900 + 797906281536 = 261670^2 + 893256^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 627354466 + ... + 627355846.

Almost surely, 2^866377470436 is an apocalyptic number.

866377470436 is the 930794-th square number.

It is an amenable number.

866377470436 is a deficient number, since it is larger than the sum of its proper divisors (655397382071).

866377470436 is an frugal number, since it uses more digits than its factorization.

866377470436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3440 (or 1720 counting only the distinct ones).

The product of its (nonzero) digits is 85349376, while the sum is 61.

The spelling of 866377470436 in words is "eight hundred sixty-six billion, three hundred seventy-seven million, four hundred seventy thousand, four hundred thirty-six".