49856666 has 4 divisors (see below), whose sum is σ = 74785002. Its totient is φ = 24928332.

The previous prime is 49856633. The next prime is 49856687. The reversal of 49856666 is 66665894.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66665894 = 2 ⋅33332947.

It can be written as a sum of positive squares in only one way, i.e., 46526041 + 3330625 = 6821^2 + 1825^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12464165 + ... + 12464168.

Almost surely, 2^49856666 is an apocalyptic number.

49856666 is a deficient number, since it is larger than the sum of its proper divisors (24928336).

49856666 is a wasteful number, since it uses less digits than its factorization.

49856666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24928335.

The product of its digits is 1866240, while the sum is 50.

The square root of 49856666 is about 7060.9252934725. The cubic root of 49856666 is about 368.0507816264.

The spelling of 49856666 in words is "forty-nine million, eight hundred fifty-six thousand, six hundred sixty-six".