961660433 has 4 divisors (see below), whose sum is σ = 1012274160. Its totient is φ = 911046708.

The previous prime is 961660417. The next prime is 961660481. The reversal of 961660433 is 334066169.

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 961660433 - 2⁴ = 961660417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (961600433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25306835 + ... + 25306872.

It is an arithmetic number, because the mean of its divisors is an integer number (253068540).

Almost surely, 2^961660433 is an apocalyptic number.

It is an amenable number.

961660433 is a deficient number, since it is larger than the sum of its proper divisors (50613727).

961660433 is a wasteful number, since it uses less digits than its factorization.

961660433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50613726.

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 961660433 is about 31010.6503156577. The cubic root of 961660433 is about 987.0532493520.

The spelling of 961660433 in words is "nine hundred sixty-one million, six hundred sixty thousand, four hundred thirty-three".