720216667 has 4 divisors (see below), whose sum is σ = 720270760. Its totient is φ = 720162576.

The previous prime is 720216659. The next prime is 720216671. The reversal of 720216667 is 766612027.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 720216667 - 2³ = 720216659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720214667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8488 + ... + 38890.

It is an arithmetic number, because the mean of its divisors is an integer number (180067690).

Almost surely, 2^720216667 is an apocalyptic number.

720216667 is a deficient number, since it is larger than the sum of its proper divisors (54093).

720216667 is a wasteful number, since it uses less digits than its factorization.

720216667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54092.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 720216667 is about 26836.8527774775. The cubic root of 720216667 is about 896.3708451579.

The spelling of 720216667 in words is "seven hundred twenty million, two hundred sixteen thousand, six hundred sixty-seven".