720266655 has 16 divisors (see below), whose sum is σ = 1152968544. Its totient is φ = 383961600.

The previous prime is 720266629. The next prime is 720266699. The reversal of 720266655 is 556662027.

It is not a de Polignac number, because 720266655 - 2¹⁹ = 719742367 is a prime.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 25555 + ... + 45755.

It is an arithmetic number, because the mean of its divisors is an integer number (72060534).

Almost surely, 2^720266655 is an apocalyptic number.

720266655 is a deficient number, since it is larger than the sum of its proper divisors (432701889).

720266655 is a wasteful number, since it uses less digits than its factorization.

720266655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22586.

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 720266655 is about 26837.7840925811. The cubic root of 720266655 is about 896.3915827827.

The spelling of 720266655 in words is "seven hundred twenty million, two hundred sixty-six thousand, six hundred fifty-five".