27666620 has 12 divisors (see below), whose sum is σ = 58099944. Its totient is φ = 11066640.

The previous prime is 27666619. The next prime is 27666637. The reversal of 27666620 is 2666672.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 691646 + ... + 691685.

It is an arithmetic number, because the mean of its divisors is an integer number (4841662).

Almost surely, 2^27666620 is an apocalyptic number.

27666620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27666620 is an abundant number, since it is smaller than the sum of its proper divisors (30433324).

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

27666620 is a wasteful number, since it uses less digits than its factorization.

27666620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383340 (or 1383338 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 27666620 is about 5259.9068432815. The cubic root of 27666620 is about 302.4489179050.

The spelling of 27666620 in words is "twenty-seven million, six hundred sixty-six thousand, six hundred twenty".