27061866 has 48 divisors (see below), whose sum is σ = 63783720. Its totient is φ = 8242560.

The previous prime is 27061861. The next prime is 27061873. The reversal of 27061866 is 66816072.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22838841 + 4223025 = 4779^2 + 2055^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 27061866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27061861) 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, 24976 + ... + 26036.

Almost surely, 2^27061866 is an apocalyptic number.

27061866 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 27061866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31891860).

27061866 is an abundant number, since it is smaller than the sum of its proper divisors (36721854).

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

27061866 is a wasteful number, since it uses less digits than its factorization.

27061866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191 (or 1188 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 27061866 is about 5202.1020751231. The cubic root of 27061866 is about 300.2289585488.

The spelling of 27061866 in words is "twenty-seven million, sixty-one thousand, eight hundred sixty-six".