2666671237 has 4 divisors (see below), whose sum is σ = 2666786976. Its totient is φ = 2666555500.

The previous prime is 2666671229. The next prime is 2666671277. The reversal of 2666671237 is 7321766662.

2666671237 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2666671237 - 2³ = 2666671229 is a prime.

It is a super-2 number, since 2×2666671237² = 14222270972486220338, 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 (2666671207) 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, 10243 + ... + 73744.

It is an arithmetic number, because the mean of its divisors is an integer number (666696744).

Almost surely, 2^2666671237 is an apocalyptic number.

It is an amenable number.

2666671237 is a deficient number, since it is larger than the sum of its proper divisors (115739).

2666671237 is an equidigital number, since it uses as much as digits as its factorization.

2666671237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115738.

The product of its digits is 762048, while the sum is 46.

The square root of 2666671237 is about 51639.8222014755. The cubic root of 2666671237 is about 1386.7233409239.

It can be divided in two parts, 26666 and 71237, that added together give a triangular number (97903 = T₄₄₂).

The spelling of 2666671237 in words is "two billion, six hundred sixty-six million, six hundred seventy-one thousand, two hundred thirty-seven".