7666423 has 2 divisors, whose sum is σ = 7666424. Its totient is φ = 7666422.

The previous prime is 7666409. The next prime is 7666433. The reversal of 7666423 is 3246667.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7666423 - 2²¹ = 5569271 is a prime.

It is a super-2 number, since 2×7666423² = 117548083229858, which contains 22 as substring.

It is an Ulam number.

7666423 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7666433) 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, 3833211 + 3833212.

It is an arithmetic number, because the mean of its divisors is an integer number (3833212).

Almost surely, 2^7666423 is an apocalyptic number.

7666423 is a deficient number, since it is larger than the sum of its proper divisors (1).

7666423 is an equidigital number, since it uses as much as digits as its factorization.

7666423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 34.

The square root of 7666423 is about 2768.8306195938. The cubic root of 7666423 is about 197.1806343074.

The spelling of 7666423 in words is "seven million, six hundred sixty-six thousand, four hundred twenty-three".