866279427 has 16 divisors (see below), whose sum is σ = 1244640768. Its totient is φ = 532772640.

The previous prime is 866279423. The next prime is 866279431. The reversal of 866279427 is 724972668.

It is an interprime number because it is at equal distance from previous prime (866279423) and next prime (866279431).

It is not a de Polignac number, because 866279427 - 2² = 866279423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 866279427.

It is not an unprimeable number, because it can be changed into a prime (866279423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69558 + ... + 81060.

It is an arithmetic number, because the mean of its divisors is an integer number (77790048).

Almost surely, 2^866279427 is an apocalyptic number.

866279427 is a deficient number, since it is larger than the sum of its proper divisors (378361341).

866279427 is a wasteful number, since it uses less digits than its factorization.

866279427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13450.

The product of its digits is 2032128, while the sum is 51.

The square root of 866279427 is about 29432.6252142074. The cubic root of 866279427 is about 953.2774801282.

The spelling of 866279427 in words is "eight hundred sixty-six million, two hundred seventy-nine thousand, four hundred twenty-seven".