721366466 has 16 divisors (see below), whose sum is σ = 1117981440. Its totient is φ = 348727440.

The previous prime is 721366453. The next prime is 721366511. The reversal of 721366466 is 664663127.

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, 71465 + ... + 80931.

It is an arithmetic number, because the mean of its divisors is an integer number (69873840).

Almost surely, 2^721366466 is an apocalyptic number.

721366466 is a deficient number, since it is larger than the sum of its proper divisors (396614974).

721366466 is a wasteful number, since it uses less digits than its factorization.

721366466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10729.

The product of its digits is 217728, while the sum is 41.

The square root of 721366466 is about 26858.2662508212. The cubic root of 721366466 is about 896.8475990625.

The spelling of 721366466 in words is "seven hundred twenty-one million, three hundred sixty-six thousand, four hundred sixty-six".