730516661 has 4 divisors (see below), whose sum is σ = 834876192. Its totient is φ = 626157132.

The previous prime is 730516607. The next prime is 730516667. The reversal of 730516661 is 166615037.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 730516661 - 2¹⁰ = 730515637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730516667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52179755 + ... + 52179768.

It is an arithmetic number, because the mean of its divisors is an integer number (208719048).

Almost surely, 2^730516661 is an apocalyptic number.

It is an amenable number.

730516661 is a deficient number, since it is larger than the sum of its proper divisors (104359531).

730516661 is a wasteful number, since it uses less digits than its factorization.

730516661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104359530.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 730516661 is about 27028.0717218229. The cubic root of 730516661 is about 900.6237079942.

The spelling of 730516661 in words is "seven hundred thirty million, five hundred sixteen thousand, six hundred sixty-one".