27660898901 has 2 divisors, whose sum is σ = 27660898902. Its totient is φ = 27660898900.

The previous prime is 27660898873. The next prime is 27660898907. The reversal of 27660898901 is 10989806672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16435496401 + 11225402500 = 128201^2 + 105950^2 .

It is a cyclic number.

It is not a de Polignac number, because 27660898901 - 2¹⁰ = 27660897877 is a prime.

It is a super-2 number, since 2×27660898901² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27660898907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13830449450 + 13830449451.

It is an arithmetic number, because the mean of its divisors is an integer number (13830449451).

Almost surely, 2^27660898901 is an apocalyptic number.

It is an amenable number.

27660898901 is a deficient number, since it is larger than the sum of its proper divisors (1).

27660898901 is an equidigital number, since it uses as much as digits as its factorization.

27660898901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The spelling of 27660898901 in words is "twenty-seven billion, six hundred sixty million, eight hundred ninety-eight thousand, nine hundred one".