2666423 has 2 divisors, whose sum is σ = 2666424. Its totient is φ = 2666422.

The previous prime is 2666393. The next prime is 2666429. The reversal of 2666423 is 3246662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2666423 - 2¹⁶ = 2600887 is a prime.

It is a super-2 number, since 2×2666423² = 14219623229858, which contains 22 as substring.

It is equal to p₁₉₄₃₈₄ and since 2666423 and 194384 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2666429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333211 + 1333212.

It is an arithmetic number, because the mean of its divisors is an integer number (1333212).

2^2666423 is an apocalyptic number.

2666423 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666423 is an equidigital number, since it uses as much as digits as its factorization.

2666423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 29.

The square root of 2666423 is about 1632.9185527760. The cubic root of 2666423 is about 138.6680310157.

The spelling of 2666423 in words is "two million, six hundred sixty-six thousand, four hundred twenty-three".