661833883 has 2 divisors, whose sum is σ = 661833884. Its totient is φ = 661833882.

The previous prime is 661833871. The next prime is 661833899. The reversal of 661833883 is 388338166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 661833883 - 2⁹ = 661833371 is a prime.

It is not a weakly prime, because it can be changed into another prime (661833833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330916941 + 330916942.

It is an arithmetic number, because the mean of its divisors is an integer number (330916942).

Almost surely, 2^661833883 is an apocalyptic number.

661833883 is a deficient number, since it is larger than the sum of its proper divisors (1).

661833883 is an equidigital number, since it uses as much as digits as its factorization.

661833883 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 46.

The square root of 661833883 is about 25726.1322977240. The cubic root of 661833883 is about 871.4644306010.

The spelling of 661833883 in words is "six hundred sixty-one million, eight hundred thirty-three thousand, eight hundred eighty-three".