2636666 has 8 divisors (see below), whose sum is σ = 4187700. Its totient is φ = 1240768.

The previous prime is 2636663. The next prime is 2636671. The reversal of 2636666 is 6666362.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2627641 + 9025 = 1621^2 + 95^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2636663) 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, 38741 + ... + 38808.

2^2636666 is an apocalyptic number.

2636666 is a deficient number, since it is larger than the sum of its proper divisors (1551034).

2636666 is a wasteful number, since it uses less digits than its factorization.

2636666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77568.

The product of its digits is 46656, while the sum is 35.

The square root of 2636666 is about 1623.7813892270. The cubic root of 2636666 is about 138.1502599121.

The spelling of 2636666 in words is "two million, six hundred thirty-six thousand, six hundred sixty-six".