2668437287 has 4 divisors (see below), whose sum is σ = 2676127656. Its totient is φ = 2660746920.

The previous prime is 2668437263. The next prime is 2668437329. The reversal of 2668437287 is 7827348662.

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 2668437287 - 2⁶ = 2668437223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2668437227) 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, 3844664 + ... + 3845357.

It is an arithmetic number, because the mean of its divisors is an integer number (669031914).

Almost surely, 2^2668437287 is an apocalyptic number.

2668437287 is a deficient number, since it is larger than the sum of its proper divisors (7690369).

2668437287 is an equidigital number, since it uses as much as digits as its factorization.

2668437287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7690368.

The product of its digits is 5419008, while the sum is 53.

The square root of 2668437287 is about 51656.9190622128. The cubic root of 2668437287 is about 1387.0294006892.

The spelling of 2668437287 in words is "two billion, six hundred sixty-eight million, four hundred thirty-seven thousand, two hundred eighty-seven".