866217342 has 16 divisors (see below), whose sum is σ = 1732776192. Its totient is φ = 288682200.

The previous prime is 866217293. The next prime is 866217361. The reversal of 866217342 is 243712668.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 866217342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28717 + ... + 50567.

It is an arithmetic number, because the mean of its divisors is an integer number (108298512).

Almost surely, 2^866217342 is an apocalyptic number.

866217342 is an abundant number, since it is smaller than the sum of its proper divisors (866558850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866217342 is a wasteful number, since it uses less digits than its factorization.

866217342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28463.

The product of its digits is 96768, while the sum is 39.

The square root of 866217342 is about 29431.5704983611. The cubic root of 866217342 is about 953.2547062424.

The spelling of 866217342 in words is "eight hundred sixty-six million, two hundred seventeen thousand, three hundred forty-two".