27429666 has 32 divisors (see below), whose sum is σ = 60749568. Its totient is φ = 8186640.

The previous prime is 27429641. The next prime is 27429667. The reversal of 27429666 is 66692472.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (27429667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1321 + ... + 7523.

It is an arithmetic number, because the mean of its divisors is an integer number (1898424).

Almost surely, 2^27429666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27429666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30374784).

27429666 is an abundant number, since it is smaller than the sum of its proper divisors (33319902).

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

27429666 is a wasteful number, since it uses less digits than its factorization.

27429666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6286.

The product of its digits is 217728, while the sum is 42.

The square root of 27429666 is about 5237.3338637135. Note that the first 3 decimals coincide. The cubic root of 27429666 is about 301.5829880270.

The spelling of 27429666 in words is "twenty-seven million, four hundred twenty-nine thousand, six hundred sixty-six".