49666251 has 4 divisors (see below), whose sum is σ = 66221672. Its totient is φ = 33110832.

The previous prime is 49666237. The next prime is 49666289. The reversal of 49666251 is 15266694.

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

It is not a de Polignac number, because 49666251 - 2⁶ = 49666187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49666651) 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, 8277706 + ... + 8277711.

It is an arithmetic number, because the mean of its divisors is an integer number (16555418).

Almost surely, 2^49666251 is an apocalyptic number.

49666251 is a deficient number, since it is larger than the sum of its proper divisors (16555421).

49666251 is a wasteful number, since it uses less digits than its factorization.

49666251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16555420.

The product of its digits is 77760, while the sum is 39.

The square root of 49666251 is about 7047.4286800222. The cubic root of 49666251 is about 367.5816247032.

The spelling of 49666251 in words is "forty-nine million, six hundred sixty-six thousand, two hundred fifty-one".