868660427 has 4 divisors (see below), whose sum is σ = 881625576. Its totient is φ = 855695280.

The previous prime is 868660409. The next prime is 868660447. The reversal of 868660427 is 724066868.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 868660427 - 2¹⁰ = 868659403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (868660447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6482474 + ... + 6482607.

It is an arithmetic number, because the mean of its divisors is an integer number (220406394).

Almost surely, 2^868660427 is an apocalyptic number.

868660427 is a deficient number, since it is larger than the sum of its proper divisors (12965149).

868660427 is a wasteful number, since it uses less digits than its factorization.

868660427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12965148.

The product of its (nonzero) digits is 774144, while the sum is 47.

The square root of 868660427 is about 29473.0457706699. The cubic root of 868660427 is about 954.1500536033.

The spelling of 868660427 in words is "eight hundred sixty-eight million, six hundred sixty thousand, four hundred twenty-seven".