27377075661 has 16 divisors (see below), whose sum is σ = 41379656640. Its totient is φ = 15960723840.

The previous prime is 27377075657. The next prime is 27377075683. The reversal of 27377075661 is 16657077372.

It is not a de Polignac number, because 27377075661 - 2² = 27377075657 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27377075161) 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, 18472320 + ... + 18473801.

It is an arithmetic number, because the mean of its divisors is an integer number (2586228540).

Almost surely, 2^27377075661 is an apocalyptic number.

It is an amenable number.

27377075661 is a deficient number, since it is larger than the sum of its proper divisors (14002580979).

27377075661 is a wasteful number, since it uses less digits than its factorization.

27377075661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36946156.

The product of its (nonzero) digits is 2593080, while the sum is 51.

The spelling of 27377075661 in words is "twenty-seven billion, three hundred seventy-seven million, seventy-five thousand, six hundred sixty-one".