27101661 has 16 divisors (see below), whose sum is σ = 36860160. Its totient is φ = 17709120.

The previous prime is 27101609. The next prime is 27101671. The reversal of 27101661 is 16610172.

It is not a de Polignac number, because 27101661 - 2⁶ = 27101597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27101671) 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, 40671 + ... + 41331.

It is an arithmetic number, because the mean of its divisors is an integer number (2303760).

Almost surely, 2^27101661 is an apocalyptic number.

It is an amenable number.

27101661 is a deficient number, since it is larger than the sum of its proper divisors (9758499).

27101661 is a wasteful number, since it uses less digits than its factorization.

27101661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 27101661 is about 5205.9255661217. The cubic root of 27101661 is about 300.3760506450.

It can be divided in two parts, 2710 and 1661, that added together give a triangular number (4371 = T₉₃).

The spelling of 27101661 in words is "twenty-seven million, one hundred one thousand, six hundred sixty-one".