720422665 has 8 divisors (see below), whose sum is σ = 864696960. Its totient is φ = 576211632.

The previous prime is 720422641. The next prime is 720422701. The reversal of 720422665 is 566224027.

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 720422665 - 2¹⁵ = 720389897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 720422665.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14542 + ... + 40648.

It is an arithmetic number, because the mean of its divisors is an integer number (108087120).

Almost surely, 2^720422665 is an apocalyptic number.

It is an amenable number.

720422665 is a deficient number, since it is larger than the sum of its proper divisors (144274295).

720422665 is a wasteful number, since it uses less digits than its factorization.

720422665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31631.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 720422665 is about 26840.6904717446. The cubic root of 720422665 is about 896.4562976834.

The spelling of 720422665 in words is "seven hundred twenty million, four hundred twenty-two thousand, six hundred sixty-five".