3906011661 has 8 divisors (see below), whose sum is σ = 5209024320. Its totient is φ = 2603503392.

The previous prime is 3906011611. The next prime is 3906011663. The reversal of 3906011661 is 1661106093.

3906011661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 3906011661 - 2¹⁰ = 3906010637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3906011663) 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, 107641 + ... + 139278.

It is an arithmetic number, because the mean of its divisors is an integer number (651128040).

Almost surely, 2^3906011661 is an apocalyptic number.

It is an amenable number.

3906011661 is a deficient number, since it is larger than the sum of its proper divisors (1303012659).

3906011661 is a wasteful number, since it uses less digits than its factorization.

3906011661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252195.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 3906011661 is about 62498.0932589147. The cubic root of 3906011661 is about 1574.8692809627.

It can be divided in two parts, 39060 and 11661, that added together give a triangular number (50721 = T₃₁₈).

The spelling of 3906011661 in words is "three billion, nine hundred six million, eleven thousand, six hundred sixty-one".