1667606423 has 16 divisors (see below), whose sum is σ = 1920672000. Its totient is φ = 1418286912.

The previous prime is 1667606417. The next prime is 1667606441. The reversal of 1667606423 is 3246067661.

It is not a de Polignac number, because 1667606423 - 2¹⁰ = 1667605399 is a prime.

It is a super-2 number, since 2×1667606423² = 5561822364061709858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667606123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 711788 + ... + 714126.

It is an arithmetic number, because the mean of its divisors is an integer number (120042000).

Almost surely, 2^1667606423 is an apocalyptic number.

1667606423 is a deficient number, since it is larger than the sum of its proper divisors (253065577).

1667606423 is a wasteful number, since it uses less digits than its factorization.

1667606423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3094.

The product of its (nonzero) digits is 217728, while the sum is 41.

The square root of 1667606423 is about 40836.3370419042. The cubic root of 1667606423 is about 1185.8539004939.

The spelling of 1667606423 in words is "one billion, six hundred sixty-seven million, six hundred six thousand, four hundred twenty-three".