2406657881 has 4 divisors (see below), whose sum is σ = 2411811792. Its totient is φ = 2401503972.

The previous prime is 2406657839. The next prime is 2406657899. The reversal of 2406657881 is 1887566042.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1887566042 = 2 ⋅943783021.

It is a cyclic number.

It is not a de Polignac number, because 2406657881 - 2²² = 2402463577 is a prime.

It is a super-2 number, since 2×2406657881² = 11584004312358820322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2406651881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2576255 + ... + 2577188.

It is an arithmetic number, because the mean of its divisors is an integer number (602952948).

Almost surely, 2^2406657881 is an apocalyptic number.

It is an amenable number.

2406657881 is a deficient number, since it is larger than the sum of its proper divisors (5153911).

2406657881 is an equidigital number, since it uses as much as digits as its factorization.

2406657881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5153910.

The product of its (nonzero) digits is 645120, while the sum is 47.

The square root of 2406657881 is about 49057.6995078245. The cubic root of 2406657881 is about 1340.1028140092.

The spelling of 2406657881 in words is "two billion, four hundred six million, six hundred fifty-seven thousand, eight hundred eighty-one".