4466638381 has 4 divisors (see below), whose sum is σ = 4489084000. Its totient is φ = 4444192764.

The previous prime is 4466638369. The next prime is 4466638399. The reversal of 4466638381 is 1838366644.

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 a de Polignac number, because none of the positive numbers 2^k-4466638381 is a prime.

It is a super-2 number, since 2×4466638381² = 39901716853244602322, 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 (4466636381) 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, 11222511 + ... + 11222908.

It is an arithmetic number, because the mean of its divisors is an integer number (1122271000).

Almost surely, 2^4466638381 is an apocalyptic number.

It is an amenable number.

4466638381 is a deficient number, since it is larger than the sum of its proper divisors (22445619).

4466638381 is a wasteful number, since it uses less digits than its factorization.

4466638381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22445618.

The product of its digits is 1990656, while the sum is 49.

The square root of 4466638381 is about 66832.9139047521. The cubic root of 4466638381 is about 1646.8735877581.

The spelling of 4466638381 in words is "four billion, four hundred sixty-six million, six hundred thirty-eight thousand, three hundred eighty-one".