3668505181 has 4 divisors (see below), whose sum is σ = 4002005664. Its totient is φ = 3335004700.

The previous prime is 3668505179. The next prime is 3668505227. The reversal of 3668505181 is 1815058663.

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 3668505181 - 2¹ = 3668505179 is a prime.

It is a super-2 number, since 2×3668505181² = 26915860526047685522, 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 (3668505121) 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, 166750225 + ... + 166750246.

It is an arithmetic number, because the mean of its divisors is an integer number (1000501416).

Almost surely, 2^3668505181 is an apocalyptic number.

It is an amenable number.

3668505181 is a deficient number, since it is larger than the sum of its proper divisors (333500483).

3668505181 is a wasteful number, since it uses less digits than its factorization.

3668505181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333500482.

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 3668505181 is about 60568.1862119050. The cubic root of 3668505181 is about 1542.2793565670.

The spelling of 3668505181 in words is "three billion, six hundred sixty-eight million, five hundred five thousand, one hundred eighty-one".