49666566 has 16 divisors (see below), whose sum is σ = 100962288. Its totient is φ = 16284000.

The previous prime is 49666541. The next prime is 49666567. The reversal of 49666566 is 66566694.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49666567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67485 + ... + 68216.

It is an arithmetic number, because the mean of its divisors is an integer number (6310143).

Almost surely, 2^49666566 is an apocalyptic number.

49666566 is an abundant number, since it is smaller than the sum of its proper divisors (51295722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49666566 is a wasteful number, since it uses less digits than its factorization.

49666566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135767.

The product of its digits is 1399680, while the sum is 48.

The square root of 49666566 is about 7047.4510285634. The cubic root of 49666566 is about 367.5824018101.

The spelling of 49666566 in words is "forty-nine million, six hundred sixty-six thousand, five hundred sixty-six".