866162137 has 4 divisors (see below), whose sum is σ = 866221840. Its totient is φ = 866102436.

The previous prime is 866162117. The next prime is 866162153. The reversal of 866162137 is 731261668.

It is a happy number.

866162137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866162137 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 866162137.

It is not an unprimeable number, because it can be changed into a prime (866162117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7438 + ... + 42280.

It is an arithmetic number, because the mean of its divisors is an integer number (216555460).

Almost surely, 2^866162137 is an apocalyptic number.

It is an amenable number.

866162137 is a deficient number, since it is larger than the sum of its proper divisors (59703).

866162137 is a wasteful number, since it uses less digits than its factorization.

866162137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59702.

The product of its digits is 72576, while the sum is 40.

The square root of 866162137 is about 29430.6326299657. The cubic root of 866162137 is about 953.2344551493.

The spelling of 866162137 in words is "eight hundred sixty-six million, one hundred sixty-two thousand, one hundred thirty-seven".