726266556 has 36 divisors (see below), whose sum is σ = 1839565000. Its totient is φ = 241597728.

The previous prime is 726266539. The next prime is 726266573. The reversal of 726266556 is 655662627.

726266556 is a `hidden beast` number, since 72 + 6 + 26 + 6 + 556 = 666.

It is an interprime number because it is at equal distance from previous prime (726266539) and next prime (726266573).

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×726266556² = 1054926220728202272, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 2251 + ... + 38178.

Almost surely, 2^726266556 is an apocalyptic number.

It is an amenable number.

726266556 is an abundant number, since it is smaller than the sum of its proper divisors (1113298444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

726266556 is a wasteful number, since it uses less digits than its factorization.

726266556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40938 (or 40933 counting only the distinct ones).

The product of its digits is 907200, while the sum is 45.

The square root of 726266556 is about 26949.3331271852. Note that the first 3 decimals coincide. The cubic root of 726266556 is about 898.8737170547.

The spelling of 726266556 in words is "seven hundred twenty-six million, two hundred sixty-six thousand, five hundred fifty-six".