27920666 has 8 divisors (see below), whose sum is σ = 43701984. Its totient is φ = 13353340.

The previous prime is 27920609. The next prime is 27920693. The reversal of 27920666 is 66602972.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 303440 + ... + 303531.

It is an arithmetic number, because the mean of its divisors is an integer number (5462748).

Almost surely, 2^27920666 is an apocalyptic number.

27920666 is a deficient number, since it is larger than the sum of its proper divisors (15781318).

27920666 is a wasteful number, since it uses less digits than its factorization.

27920666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606996.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 27920666 is about 5284.0009462528. Note that the first 3 decimals coincide. The cubic root of 27920666 is about 303.3718345312.

The spelling of 27920666 in words is "twenty-seven million, nine hundred twenty thousand, six hundred sixty-six".