720766 has 24 divisors (see below), whose sum is σ = 1215720. Its totient is φ = 319872.

The previous prime is 720763. The next prime is 720767. The reversal of 720766 is 667027.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720763) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16741 + ... + 16783.

It is an arithmetic number, because the mean of its divisors is an integer number (50655).

2⁷²⁰⁷⁶⁶ is an apocalyptic number.

720766 is a deficient number, since it is larger than the sum of its proper divisors (494954).

720766 is a wasteful number, since it uses less digits than its factorization.

720766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 720766 is about 848.9793872645. The cubic root of 720766 is about 89.6598684441.

The spelling of 720766 in words is "seven hundred twenty thousand, seven hundred sixty-six".