766204721 has 8 divisors (see below), whose sum is σ = 774312000. Its totient is φ = 758131920.

The previous prime is 766204687. The next prime is 766204741. The reversal of 766204721 is 127402667.

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

It is a cyclic number.

It is not a de Polignac number, because 766204721 - 2⁶ = 766204657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (766204741) 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 7 ways as a sum of consecutive naturals, for example, 37340 + ... + 54098.

It is an arithmetic number, because the mean of its divisors is an integer number (96789000).

Almost surely, 2^766204721 is an apocalyptic number.

It is an amenable number.

766204721 is a deficient number, since it is larger than the sum of its proper divisors (8107279).

766204721 is a wasteful number, since it uses less digits than its factorization.

766204721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17239.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 766204721 is about 27680.4031943178. The cubic root of 766204721 is about 915.0572673604.

The spelling of 766204721 in words is "seven hundred sixty-six million, two hundred four thousand, seven hundred twenty-one".