66624257723 has 2 divisors, whose sum is σ = 66624257724. Its totient is φ = 66624257722.

The previous prime is 66624257683. The next prime is 66624257737. The reversal of 66624257723 is 32775242666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66624257723 - 2²⁶ = 66557148859 is a prime.

It is not a weakly prime, because it can be changed into another prime (66624257743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33312128861 + 33312128862.

It is an arithmetic number, because the mean of its divisors is an integer number (33312128862).

Almost surely, 2^66624257723 is an apocalyptic number.

66624257723 is a deficient number, since it is larger than the sum of its proper divisors (1).

66624257723 is an equidigital number, since it uses as much as digits as its factorization.

66624257723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5080320, while the sum is 50.

The spelling of 66624257723 in words is "sixty-six billion, six hundred twenty-four million, two hundred fifty-seven thousand, seven hundred twenty-three".