866190487 has 16 divisors (see below), whose sum is σ = 921369600. Its totient is φ = 812021760.

The previous prime is 866190469. The next prime is 866190497. The reversal of 866190487 is 784091668.

It is a cyclic number.

It is not a de Polignac number, because 866190487 - 2¹⁹ = 865666199 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 866190487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866190467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 873562 + ... + 874552.

It is an arithmetic number, because the mean of its divisors is an integer number (57585600).

Almost surely, 2^866190487 is an apocalyptic number.

866190487 is a deficient number, since it is larger than the sum of its proper divisors (55179113).

866190487 is a wasteful number, since it uses less digits than its factorization.

866190487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 866190487 is about 29431.1142670474. The cubic root of 866190487 is about 953.2448550120.

The spelling of 866190487 in words is "eight hundred sixty-six million, one hundred ninety thousand, four hundred eighty-seven".