720901667 has 8 divisors (see below), whose sum is σ = 759091200. Its totient is φ = 682736904.

The previous prime is 720901663. The next prime is 720901679. The reversal of 720901667 is 766109027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 720901667 - 2² = 720901663 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 720901667.

It is not an unprimeable number, because it can be changed into a prime (720901663) 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, 103934 + ... + 110652.

It is an arithmetic number, because the mean of its divisors is an integer number (94886400).

Almost surely, 2^720901667 is an apocalyptic number.

720901667 is a deficient number, since it is larger than the sum of its proper divisors (38189533).

720901667 is a wasteful number, since it uses less digits than its factorization.

720901667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12385.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 720901667 is about 26849.6120456144. The cubic root of 720901667 is about 896.6549353474.

The spelling of 720901667 in words is "seven hundred twenty million, nine hundred one thousand, six hundred sixty-seven".