2666401343 has 4 divisors (see below), whose sum is σ = 2680217088. Its totient is φ = 2652585600.

The previous prime is 2666401307. The next prime is 2666401393. The reversal of 2666401343 is 3431046662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3431046662 = 2 ⋅1715523331.

It is a cyclic number.

It is not a de Polignac number, because 2666401343 - 2⁶ = 2666401279 is a prime.

It is a super-2 number, since 2×2666401343² = 14219392243904407298, 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 (2666401393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6907583 + ... + 6907968.

It is an arithmetic number, because the mean of its divisors is an integer number (670054272).

Almost surely, 2^2666401343 is an apocalyptic number.

2666401343 is a deficient number, since it is larger than the sum of its proper divisors (13815745).

2666401343 is a wasteful number, since it uses less digits than its factorization.

2666401343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13815744.

The product of its (nonzero) digits is 62208, while the sum is 35.

The square root of 2666401343 is about 51637.2089001720. The cubic root of 2666401343 is about 1386.6765558870.

The spelling of 2666401343 in words is "two billion, six hundred sixty-six million, four hundred one thousand, three hundred forty-three".