3366555661 has 4 divisors (see below), whose sum is σ = 3847492192. Its totient is φ = 2885619132.

The previous prime is 3366555649. The next prime is 3366555677. The reversal of 3366555661 is 1665556633.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3366555661 - 2¹⁵ = 3366522893 is a prime.

It is a super-2 number, since 2×3366555661² = 22667394037222293842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3366555631) 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, 240468255 + ... + 240468268.

It is an arithmetic number, because the mean of its divisors is an integer number (961873048).

Almost surely, 2^3366555661 is an apocalyptic number.

It is an amenable number.

3366555661 is a deficient number, since it is larger than the sum of its proper divisors (480936531).

3366555661 is an equidigital number, since it uses as much as digits as its factorization.

3366555661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480936530.

The product of its digits is 1458000, while the sum is 46.

The square root of 3366555661 is about 58022.0273775400. The cubic root of 3366555661 is about 1498.7479420061.

The spelling of 3366555661 in words is "three billion, three hundred sixty-six million, five hundred fifty-five thousand, six hundred sixty-one".