49986666 has 16 divisors (see below), whose sum is σ = 111081600. Its totient is φ = 16662204.

The previous prime is 49986649. The next prime is 49986707. The reversal of 49986666 is 66668994.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 925679 = 49986666 / (4 + 9 + 9 + 8 + 6 + 6 + 6 + 6).

49986666 is a modest number, since divided by 6666 gives 4998 as remainder.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462786 + ... + 462893.

It is an arithmetic number, because the mean of its divisors is an integer number (6942600).

Almost surely, 2^49986666 is an apocalyptic number.

49986666 is an abundant number, since it is smaller than the sum of its proper divisors (61094934).

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

49986666 is a wasteful number, since it uses less digits than its factorization.

49986666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925690 (or 925684 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The square root of 49986666 is about 7070.1248928148. The cubic root of 49986666 is about 368.3703983685.

It can be divided in two parts, 4998 and 6666, that added together give a square (11664 = 108²).

The spelling of 49986666 in words is "forty-nine million, nine hundred eighty-six thousand, six hundred sixty-six".