2456131666 has 4 divisors (see below), whose sum is σ = 3684197502. Its totient is φ = 1228065832.

The previous prime is 2456131651. The next prime is 2456131679. The reversal of 2456131666 is 6661316542.

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

It can be written as a sum of positive squares in only one way, i.e., 1864426041 + 591705625 = 43179^2 + 24325^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614032915 + ... + 614032918.

Almost surely, 2^2456131666 is an apocalyptic number.

2456131666 is a deficient number, since it is larger than the sum of its proper divisors (1228065836).

2456131666 is a wasteful number, since it uses less digits than its factorization.

2456131666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228065835.

The product of its digits is 155520, while the sum is 40.

The square root of 2456131666 is about 49559.3751574816. The cubic root of 2456131666 is about 1349.2234520732.

The spelling of 2456131666 in words is "two billion, four hundred fifty-six million, one hundred thirty-one thousand, six hundred sixty-six".