3666651 has 8 divisors (see below), whose sum is σ = 4934160. Its totient is φ = 2421792.

The previous prime is 3666647. The next prime is 3666659. The reversal of 3666651 is 1566663.

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

It is not a de Polignac number, because 3666651 - 2² = 3666647 is a prime.

It is an Ulam number.

3666651 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3666659) 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, 5280 + ... + 5933.

It is an arithmetic number, because the mean of its divisors is an integer number (616770).

Almost surely, 2^3666651 is an apocalyptic number.

3666651 is a deficient number, since it is larger than the sum of its proper divisors (1267509).

3666651 is a wasteful number, since it uses less digits than its factorization.

3666651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11325.

The product of its digits is 19440, while the sum is 33.

The square root of 3666651 is about 1914.8501246834. The cubic root of 3666651 is about 154.2019473512.

The spelling of 3666651 in words is "three million, six hundred sixty-six thousand, six hundred fifty-one".