2506666737 has 4 divisors (see below), whose sum is σ = 3342222320. Its totient is φ = 1671111156.

The previous prime is 2506666703. The next prime is 2506666739. The reversal of 2506666737 is 7376666052.

It is a happy number.

2506666737 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.

It is not a de Polignac number, because 2506666737 - 2¹⁹ = 2506142449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2506666739) 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, 417777787 + ... + 417777792.

It is an arithmetic number, because the mean of its divisors is an integer number (835555580).

Almost surely, 2^2506666737 is an apocalyptic number.

It is an amenable number.

2506666737 is a deficient number, since it is larger than the sum of its proper divisors (835555583).

2506666737 is an equidigital number, since it uses as much as digits as its factorization.

2506666737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835555582.

The product of its (nonzero) digits is 1905120, while the sum is 48.

The square root of 2506666737 is about 50066.6229837803. The cubic root of 2506666737 is about 1358.4141580554.

It can be divided in two parts, 250666 and 6737, that added together give a triangular number (257403 = T₇₁₇).

The spelling of 2506666737 in words is "two billion, five hundred six million, six hundred sixty-six thousand, seven hundred thirty-seven".