661184023 has 2 divisors, whose sum is σ = 661184024. Its totient is φ = 661184022.

The previous prime is 661183981. The next prime is 661184053. The reversal of 661184023 is 320481166.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 661184023 - 2⁹ = 661183511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (661184053) 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 as a sum of consecutive naturals, namely, 330592011 + 330592012.

It is an arithmetic number, because the mean of its divisors is an integer number (330592012).

Almost surely, 2^661184023 is an apocalyptic number.

661184023 is a deficient number, since it is larger than the sum of its proper divisors (1).

661184023 is an equidigital number, since it uses as much as digits as its factorization.

661184023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 661184023 is about 25713.4988478814. The cubic root of 661184023 is about 871.1791045538.

The spelling of 661184023 in words is "six hundred sixty-one million, one hundred eighty-four thousand, twenty-three".