14666820257 has 4 divisors (see below), whose sum is σ = 14754645696. Its totient is φ = 14578994820.

The previous prime is 14666820241. The next prime is 14666820269. The reversal of 14666820257 is 75202866641.

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 14666820257 - 2⁴ = 14666820241 is a prime.

It is a super-2 number, since 2×14666820257² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14666823257) 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, 43912469 + ... + 43912802.

It is an arithmetic number, because the mean of its divisors is an integer number (3688661424).

Almost surely, 2^14666820257 is an apocalyptic number.

It is an amenable number.

14666820257 is a deficient number, since it is larger than the sum of its proper divisors (87825439).

14666820257 is an equidigital number, since it uses as much as digits as its factorization.

14666820257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87825438.

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 14666820257 in words is "fourteen billion, six hundred sixty-six million, eight hundred twenty thousand, two hundred fifty-seven".