2378665671 has 4 divisors (see below), whose sum is σ = 3171554232. Its totient is φ = 1585777112.

The previous prime is 2378665649. The next prime is 2378665673. The reversal of 2378665671 is 1765668732.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2378665671 - 2⁶ = 2378665607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2378665673) 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, 396444276 + ... + 396444281.

It is an arithmetic number, because the mean of its divisors is an integer number (792888558).

Almost surely, 2^2378665671 is an apocalyptic number.

2378665671 is a deficient number, since it is larger than the sum of its proper divisors (792888561).

2378665671 is an equidigital number, since it uses as much as digits as its factorization.

2378665671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792888560.

The product of its digits is 2540160, while the sum is 51.

The square root of 2378665671 is about 48771.5662143426. The cubic root of 2378665671 is about 1334.8868913415.

The spelling of 2378665671 in words is "two billion, three hundred seventy-eight million, six hundred sixty-five thousand, six hundred seventy-one".