27731466687 has 8 divisors (see below), whose sum is σ = 36980937136. Its totient is φ = 18484820352.

The previous prime is 27731466641. The next prime is 27731466691. The reversal of 27731466687 is 78666413772.

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

It is not a de Polignac number, because 27731466687 - 2⁷ = 27731466559 is a prime.

It is a super-2 number, since 2×27731466687² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27731466187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 683008 + ... + 722469.

It is an arithmetic number, because the mean of its divisors is an integer number (4622617142).

Almost surely, 2^27731466687 is an apocalyptic number.

27731466687 is a deficient number, since it is larger than the sum of its proper divisors (9249470449).

27731466687 is a wasteful number, since it uses less digits than its factorization.

27731466687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412057.

The product of its digits is 14224896, while the sum is 57.

The spelling of 27731466687 in words is "twenty-seven billion, seven hundred thirty-one million, four hundred sixty-six thousand, six hundred eighty-seven".