2665631806 has 8 divisors (see below), whose sum is σ = 4033832544. Its totient is φ = 1321020960.

The previous prime is 2665631803. The next prime is 2665631819. The reversal of 2665631806 is 6081365662.

2665631806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665631803) 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, 5897190 + ... + 5897641.

It is an arithmetic number, because the mean of its divisors is an integer number (504229068).

Almost surely, 2^2665631806 is an apocalyptic number.

2665631806 is a deficient number, since it is larger than the sum of its proper divisors (1368200738).

2665631806 is a wasteful number, since it uses less digits than its factorization.

2665631806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11794946.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 2665631806 is about 51629.7569818027. The cubic root of 2665631806 is about 1386.5431424141.

The spelling of 2665631806 in words is "two billion, six hundred sixty-five million, six hundred thirty-one thousand, eight hundred six".