3666859 has 8 divisors (see below), whose sum is σ = 4209408. Its totient is φ = 3129000.

The previous prime is 3666853. The next prime is 3666877. The reversal of 3666859 is 9586663.

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

It is not a de Polignac number, because 3666859 - 2⁵ = 3666827 is a prime.

It is a super-3 number, since 3×3666859³ (a number of 21 digits) contains 333 as substring.

It is a d-powerful number, because it can be written as 3² + 6² + 6⁴ + 6⁸ + 8⁵ + 5⁹ + 9 .

3666859 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3666853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 714 + ... + 2800.

It is an arithmetic number, because the mean of its divisors is an integer number (526176).

Almost surely, 2^3666859 is an apocalyptic number.

3666859 is a deficient number, since it is larger than the sum of its proper divisors (542549).

3666859 is a wasteful number, since it uses less digits than its factorization.

3666859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345.

The product of its digits is 233280, while the sum is 43.

The square root of 3666859 is about 1914.9044362579. The cubic root of 3666859 is about 154.2048631271.

It can be divided in two parts, 366 and 6859, that added together give a square (7225 = 85²).

The spelling of 3666859 in words is "three million, six hundred sixty-six thousand, eight hundred fifty-nine".