866641342 has 24 divisors (see below), whose sum is σ = 1526092920. Its totient is φ = 368005680.

The previous prime is 866641339. The next prime is 866641381. The reversal of 866641342 is 243146668.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 866641295 and 866641304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29884 + ... + 51247.

It is an arithmetic number, because the mean of its divisors is an integer number (63587205).

Almost surely, 2^866641342 is an apocalyptic number.

866641342 is a deficient number, since it is larger than the sum of its proper divisors (659451578).

866641342 is a wasteful number, since it uses less digits than its factorization.

866641342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81256 (or 81249 counting only the distinct ones).

The product of its digits is 165888, while the sum is 40.

The square root of 866641342 is about 29438.7727665404. The cubic root of 866641342 is about 953.4102153535.

The spelling of 866641342 in words is "eight hundred sixty-six million, six hundred forty-one thousand, three hundred forty-two".