27660140121 has 32 divisors (see below), whose sum is σ = 37475942400. Its totient is φ = 18145378944.

The previous prime is 27660140111. The next prime is 27660140129. The reversal of 27660140121 is 12104106672.

It is not a de Polignac number, because 27660140121 - 2⁵ = 27660140089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27660140129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31324746 + ... + 31325628.

It is an arithmetic number, because the mean of its divisors is an integer number (1171123200).

Almost surely, 2^27660140121 is an apocalyptic number.

It is an amenable number.

27660140121 is a deficient number, since it is larger than the sum of its proper divisors (9815802279).

27660140121 is a wasteful number, since it uses less digits than its factorization.

27660140121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605.

The product of its (nonzero) digits is 4032, while the sum is 30.

Adding to 27660140121 its reverse (12104106672), we get a palindrome (39764246793).

The spelling of 27660140121 in words is "twenty-seven billion, six hundred sixty million, one hundred forty thousand, one hundred twenty-one".