706621556 has 12 divisors (see below), whose sum is σ = 1239527940. Its totient is φ = 352470720.

The previous prime is 706621549. The next prime is 706621631. The reversal of 706621556 is 655126607.

It can be written as a sum of positive squares in 2 ways, for example, as 239197156 + 467424400 = 15466^2 + 21620^2 .

It is a super-2 number, since 2×706621556² = 998628046807722272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208121 + ... + 211488.

It is an arithmetic number, because the mean of its divisors is an integer number (103293995).

Almost surely, 2^706621556 is an apocalyptic number.

It is an amenable number.

706621556 is a deficient number, since it is larger than the sum of its proper divisors (532906384).

706621556 is a wasteful number, since it uses less digits than its factorization.

706621556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420034 (or 420032 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 706621556 is about 26582.3542223032. The cubic root of 706621556 is about 890.6948897012.

The spelling of 706621556 in words is "seven hundred six million, six hundred twenty-one thousand, five hundred fifty-six".