721366512 has 40 divisors (see below), whose sum is σ = 1864810704. Its totient is φ = 240290304.

The previous prime is 721366511. The next prime is 721366531. The reversal of 721366512 is 215663127.

It is a super-2 number, since 2×721366512² = 1040739289270092288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721366511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79858 + ... + 88430.

Almost surely, 2^721366512 is an apocalyptic number.

It is an amenable number.

721366512 is an abundant number, since it is smaller than the sum of its proper divisors (1143444192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

721366512 is a wasteful number, since it uses less digits than its factorization.

721366512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10337 (or 10331 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 721366512 is about 26858.2671071683. The cubic root of 721366512 is about 896.8476181259.

The spelling of 721366512 in words is "seven hundred twenty-one million, three hundred sixty-six thousand, five hundred twelve".