814664671 has 4 divisors (see below), whose sum is σ = 824479992. Its totient is φ = 804849352.

The previous prime is 814664657. The next prime is 814664689. The reversal of 814664671 is 176466418.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176466418 = 2 ⋅88233209.

It is a cyclic number.

It is not a de Polignac number, because 814664671 - 2⁵ = 814664639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (814664651) 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, 4907536 + ... + 4907701.

It is an arithmetic number, because the mean of its divisors is an integer number (206119998).

Almost surely, 2^814664671 is an apocalyptic number.

814664671 is a deficient number, since it is larger than the sum of its proper divisors (9815321).

814664671 is an equidigital number, since it uses as much as digits as its factorization.

814664671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9815320.

The product of its digits is 193536, while the sum is 43.

The square root of 814664671 is about 28542.3312117283. The cubic root of 814664671 is about 933.9557373024.

The spelling of 814664671 in words is "eight hundred fourteen million, six hundred sixty-four thousand, six hundred seventy-one".