721341066 has 8 divisors (see below), whose sum is σ = 1442682144. Its totient is φ = 240447020.

The previous prime is 721341029. The next prime is 721341073. The reversal of 721341066 is 660143127.

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

721341066 is an admirable number.

It is an unprimeable number.

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, 60111750 + ... + 60111761.

It is an arithmetic number, because the mean of its divisors is an integer number (180335268).

Almost surely, 2^721341066 is an apocalyptic number.

721341066 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

721341066 is a wasteful number, since it uses less digits than its factorization.

721341066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120223516.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 721341066 is about 26857.7933940970. The cubic root of 721341066 is about 896.8370726530.

The spelling of 721341066 in words is "seven hundred twenty-one million, three hundred forty-one thousand, sixty-six".