3256011661 has 4 divisors (see below), whose sum is σ = 3721156192. Its totient is φ = 2790867132.

The previous prime is 3256011631. The next prime is 3256011673. The reversal of 3256011661 is 1661106523.

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 3256011661 - 2¹⁵ = 3255978893 is a prime.

It is a super-2 number, since 2×3256011661² = 21203223873135957842, 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 (3256011631) 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, 232572255 + ... + 232572268.

It is an arithmetic number, because the mean of its divisors is an integer number (930289048).

Almost surely, 2^3256011661 is an apocalyptic number.

It is an amenable number.

3256011661 is a deficient number, since it is larger than the sum of its proper divisors (465144531).

3256011661 is an equidigital number, since it uses as much as digits as its factorization.

3256011661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465144530.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 3256011661 is about 57061.4726501166. The cubic root of 3256011661 is about 1482.1607804776.

The spelling of 3256011661 in words is "three billion, two hundred fifty-six million, eleven thousand, six hundred sixty-one".