2666342431 has 4 divisors (see below), whose sum is σ = 2669931792. Its totient is φ = 2662753072.

The previous prime is 2666342423. The next prime is 2666342443. The reversal of 2666342431 is 1342436662.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2666342431 - 2³ = 2666342423 is a prime.

It is a super-2 number, since 2×2666342431² = 14218763918701979522, 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 (2666342411) 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, 1793566 + ... + 1795051.

It is an arithmetic number, because the mean of its divisors is an integer number (667482948).

Almost surely, 2^2666342431 is an apocalyptic number.

2666342431 is a deficient number, since it is larger than the sum of its proper divisors (3589361).

2666342431 is an equidigital number, since it uses as much as digits as its factorization.

2666342431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3589360.

The product of its digits is 124416, while the sum is 37.

The square root of 2666342431 is about 51636.6384556547. The cubic root of 2666342431 is about 1386.6663433095. Note that the first 3 decimals are identical.

The spelling of 2666342431 in words is "two billion, six hundred sixty-six million, three hundred forty-two thousand, four hundred thirty-one".