3661655206 has 16 divisors (see below), whose sum is σ = 5999804928. Its totient is φ = 1662165000.

The previous prime is 3661655197. The next prime is 3661655219. The reversal of 3661655206 is 6025561663.

It is a happy number.

It is a super-3 number, since 3×3661655206³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94290 + ... + 127333.

It is an arithmetic number, because the mean of its divisors is an integer number (374987808).

Almost surely, 2^3661655206 is an apocalyptic number.

3661655206 is a deficient number, since it is larger than the sum of its proper divisors (2338149722).

3661655206 is a wasteful number, since it uses less digits than its factorization.

3661655206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222387.

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 3661655206 is about 60511.6121583288. The cubic root of 3661655206 is about 1541.3188238821.

The spelling of 3661655206 in words is "three billion, six hundred sixty-one million, six hundred fifty-five thousand, two hundred six".