7666657423 has 2 divisors, whose sum is σ = 7666657424. Its totient is φ = 7666657422.

The previous prime is 7666657403. The next prime is 7666657469. The reversal of 7666657423 is 3247566667.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7666657423 - 2⁵ = 7666657391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7666657403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3833328711 + 3833328712.

It is an arithmetic number, because the mean of its divisors is an integer number (3833328712).

Almost surely, 2^7666657423 is an apocalyptic number.

7666657423 is a deficient number, since it is larger than the sum of its proper divisors (1).

7666657423 is an equidigital number, since it uses as much as digits as its factorization.

7666657423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 52.

The square root of 7666657423 is about 87559.4507920190. The cubic root of 7666657423 is about 1971.8264407587.

The spelling of 7666657423 in words is "seven billion, six hundred sixty-six million, six hundred fifty-seven thousand, four hundred twenty-three".