6467881 has 4 divisors (see below), whose sum is σ = 7391872. Its totient is φ = 5543892.

The previous prime is 6467869. The next prime is 6467917. The reversal of 6467881 is 1887646.

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 6467881 - 2⁵ = 6467849 is a prime.

It is a super-2 number, since 2×6467881² = 83666969260322, which contains 22 as substring.

It is a Duffinian number.

6467881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6467801) 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, 461985 + ... + 461998.

It is an arithmetic number, because the mean of its divisors is an integer number (1847968).

Almost surely, 2^6467881 is an apocalyptic number.

It is an amenable number.

6467881 is a deficient number, since it is larger than the sum of its proper divisors (923991).

6467881 is an equidigital number, since it uses as much as digits as its factorization.

6467881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923990.

The product of its digits is 64512, while the sum is 40.

The square root of 6467881 is about 2543.2029018543. The cubic root of 6467881 is about 186.3176539052.

The spelling of 6467881 in words is "six million, four hundred sixty-seven thousand, eight hundred eighty-one".