3671699881 has 4 divisors (see below), whose sum is σ = 3671821252. Its totient is φ = 3671578512.

The previous prime is 3671699851. The next prime is 3671699887. The reversal of 3671699881 is 1889961763.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1889961763 = 33911 ⋅55733.

It can be written as a sum of positive squares in 2 ways, for example, as 3243872025 + 427827856 = 56955^2 + 20684^2 .

It is a cyclic number.

It is not a de Polignac number, because 3671699881 - 2⁷ = 3671699753 is a prime.

It is a super-2 number, since 2×3671699881² = 26962760032270828322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3671699887) 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, 25375 + ... + 89371.

It is an arithmetic number, because the mean of its divisors is an integer number (917955313).

Almost surely, 2^3671699881 is an apocalyptic number.

It is an amenable number.

3671699881 is a deficient number, since it is larger than the sum of its proper divisors (121371).

3671699881 is an equidigital number, since it uses as much as digits as its factorization.

3671699881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121370.

The product of its digits is 3919104, while the sum is 58.

The square root of 3671699881 is about 60594.5532288175. The cubic root of 3671699881 is about 1542.7269221790.

The spelling of 3671699881 in words is "three billion, six hundred seventy-one million, six hundred ninety-nine thousand, eight hundred eighty-one".