660157423 has 2 divisors, whose sum is σ = 660157424. Its totient is φ = 660157422.

The previous prime is 660157403. The next prime is 660157427. The reversal of 660157423 is 324751066.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 660157423 - 2⁵ = 660157391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660157427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330078711 + 330078712.

It is an arithmetic number, because the mean of its divisors is an integer number (330078712).

Almost surely, 2^660157423 is an apocalyptic number.

660157423 is a deficient number, since it is larger than the sum of its proper divisors (1).

660157423 is an equidigital number, since it uses as much as digits as its factorization.

660157423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 660157423 is about 25693.5288156376. The cubic root of 660157423 is about 870.7279867030.

The spelling of 660157423 in words is "six hundred sixty million, one hundred fifty-seven thousand, four hundred twenty-three".