27495669661 has 8 divisors (see below), whose sum is σ = 29131073280. Its totient is φ = 25862267328.

The previous prime is 27495669623. The next prime is 27495669667. The reversal of 27495669661 is 16696659472.

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

It is a cyclic number.

It is not a de Polignac number, because 27495669661 - 2⁷ = 27495669533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27495669661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27495669667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471981 + ... + 527026.

It is an arithmetic number, because the mean of its divisors is an integer number (3641384160).

Almost surely, 2^27495669661 is an apocalyptic number.

It is an amenable number.

27495669661 is a deficient number, since it is larger than the sum of its proper divisors (1635403619).

27495669661 is a wasteful number, since it uses less digits than its factorization.

27495669661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000643.

The product of its digits is 29393280, while the sum is 61.

The spelling of 27495669661 in words is "twenty-seven billion, four hundred ninety-five million, six hundred sixty-nine thousand, six hundred sixty-one".