866657242 has 8 divisors (see below), whose sum is σ = 1418166432. Its totient is φ = 393935100.

The previous prime is 866657189. The next prime is 866657243. The reversal of 866657242 is 242756668.

866657242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×866657242² = 1502189550222093128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 866657192 and 866657201.

It is not an unprimeable number, because it can be changed into a prime (866657243) 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, 19696734 + ... + 19696777.

It is an arithmetic number, because the mean of its divisors is an integer number (177270804).

Almost surely, 2^866657242 is an apocalyptic number.

866657242 is a deficient number, since it is larger than the sum of its proper divisors (551509190).

866657242 is a wasteful number, since it uses less digits than its factorization.

866657242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39393524.

The product of its digits is 967680, while the sum is 46.

The square root of 866657242 is about 29439.0428173200. The cubic root of 866657242 is about 953.4160459584.

The spelling of 866657242 in words is "eight hundred sixty-six million, six hundred fifty-seven thousand, two hundred forty-two".