721065466 has 32 divisors (see below), whose sum is σ = 1244548800. Its totient is φ = 309876480.

The previous prime is 721065439. The next prime is 721065467. The reversal of 721065466 is 664560127.

It is a happy number.

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (721065467) 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 15 ways as a sum of consecutive naturals, for example, 246420 + ... + 249328.

It is an arithmetic number, because the mean of its divisors is an integer number (38892150).

Almost surely, 2^721065466 is an apocalyptic number.

721065466 is a deficient number, since it is larger than the sum of its proper divisors (523483334).

721065466 is a wasteful number, since it uses less digits than its factorization.

721065466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3534.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 721065466 is about 26852.6621771474. The cubic root of 721065466 is about 896.7228410762.

The spelling of 721065466 in words is "seven hundred twenty-one million, sixty-five thousand, four hundred sixty-six".