866666040602 has 8 divisors (see below), whose sum is σ = 1300012845300. Its totient is φ = 433328425504.

The previous prime is 866666040533. The next prime is 866666040649. The reversal of 866666040602 is 206040666668.

It is a Cunningham number, because it is equal to 930949²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 866666040601 + 1 = 930949^2 + 1^2 .

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

It is a super-2 number, since 2×866666040602² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2056577 + ... + 2441892.

Almost surely, 2^866666040602 is an apocalyptic number.

866666040602 is a deficient number, since it is larger than the sum of its proper divisors (433346804698).

866666040602 is a wasteful number, since it uses less digits than its factorization.

866666040602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4594800.

The product of its (nonzero) digits is 2985984, while the sum is 50.

The spelling of 866666040602 in words is "eight hundred sixty-six billion, six hundred sixty-six million, forty thousand, six hundred two".