720672766 has 16 divisors (see below), whose sum is σ = 1181664000. Its totient is φ = 326917080.

The previous prime is 720672763. The next prime is 720672809. The reversal of 720672766 is 667276027.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720672763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21846 + ... + 43801.

It is an arithmetic number, because the mean of its divisors is an integer number (73854000).

Almost surely, 2^720672766 is an apocalyptic number.

720672766 is a deficient number, since it is larger than the sum of its proper divisors (460991234).

720672766 is a wasteful number, since it uses less digits than its factorization.

720672766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66159.

The product of its (nonzero) digits is 296352, while the sum is 43.

The square root of 720672766 is about 26845.3490571458. The cubic root of 720672766 is about 896.5600232173.

The spelling of 720672766 in words is "seven hundred twenty million, six hundred seventy-two thousand, seven hundred sixty-six".