3621666 has 16 divisors (see below), whose sum is σ = 7624800. Its totient is φ = 1143648.

The previous prime is 3621661. The next prime is 3621691. The reversal of 3621666 is 6661263.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (3621661) 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, 15771 + ... + 15998.

It is an arithmetic number, because the mean of its divisors is an integer number (476550).

Almost surely, 2^3621666 is an apocalyptic number.

3621666 is an abundant number, since it is smaller than the sum of its proper divisors (4003134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3621666 is a wasteful number, since it uses less digits than its factorization.

3621666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31793.

The product of its digits is 7776, while the sum is 30.

The square root of 3621666 is about 1903.0675237626. The cubic root of 3621666 is about 153.5687321065.

The spelling of 3621666 in words is "three million, six hundred twenty-one thousand, six hundred sixty-six".