720664514 has 8 divisors (see below), whose sum is σ = 1081287228. Its totient is φ = 360235440.

The previous prime is 720664487. The next prime is 720664517. The reversal of 720664514 is 415466027.

It can be written as a sum of positive squares in 2 ways, for example, as 557668225 + 162996289 = 23615^2 + 12767^2 .

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

It is not an unprimeable number, because it can be changed into a prime (720664517) 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, 38717 + ... + 54224.

Almost surely, 2^720664514 is an apocalyptic number.

720664514 is a deficient number, since it is larger than the sum of its proper divisors (360622714).

720664514 is a wasteful number, since it uses less digits than its factorization.

720664514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96820.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 720664514 is about 26845.1953615540. The cubic root of 720664514 is about 896.5566012104.

The spelling of 720664514 in words is "seven hundred twenty million, six hundred sixty-four thousand, five hundred fourteen".