27726666 has 48 divisors (see below), whose sum is σ = 61580064. Its totient is φ = 8316000.

The previous prime is 27726659. The next prime is 27726667. The reversal of 27726666 is 66662772.

27726666 is a modest number, since divided by 6666 gives 2772 as remainder.

It is not an unprimeable number, because it can be changed into a prime (27726667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131301 + ... + 131511.

It is an arithmetic number, because the mean of its divisors is an integer number (1282918).

Almost surely, 2^27726666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27726666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30790032).

27726666 is an abundant number, since it is smaller than the sum of its proper divisors (33853398).

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

27726666 is a wasteful number, since it uses less digits than its factorization.

27726666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419 (or 408 counting only the distinct ones).

The product of its digits is 254016, while the sum is 42.

The square root of 27726666 is about 5265.6116453837. The cubic root of 27726666 is about 302.6675655645.

The spelling of 27726666 in words is "twenty-seven million, seven hundred twenty-six thousand, six hundred sixty-six".