726772664 has 32 divisors (see below), whose sum is σ = 1380512640. Its totient is φ = 358668000.

The previous prime is 726772663. The next prime is 726772693. The reversal of 726772664 is 466277627.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726772663) 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, 195059 + ... + 198749.

It is an arithmetic number, because the mean of its divisors is an integer number (43141020).

Almost surely, 2^726772664 is an apocalyptic number.

It is an amenable number.

726772664 is a deficient number, since it is larger than the sum of its proper divisors (653739976).

726772664 is a wasteful number, since it uses less digits than its factorization.

726772664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4011 (or 4007 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 47.

The square root of 726772664 is about 26958.7214830377. The cubic root of 726772664 is about 899.0824657308.

The spelling of 726772664 in words is "seven hundred twenty-six million, seven hundred seventy-two thousand, six hundred sixty-four".