1668669227 has 4 divisors (see below), whose sum is σ = 1677888576. Its totient is φ = 1659449880.

The previous prime is 1668669199. The next prime is 1668669239. The reversal of 1668669227 is 7229668661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7229668661 = 73 ⋅99036557.

It is a cyclic number.

It is not a de Polignac number, because 1668669227 - 2⁸ = 1668668971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668669257) 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, 4609403 + ... + 4609764.

It is an arithmetic number, because the mean of its divisors is an integer number (419472144).

Almost surely, 2^1668669227 is an apocalyptic number.

1668669227 is a deficient number, since it is larger than the sum of its proper divisors (9219349).

1668669227 is an equidigital number, since it uses as much as digits as its factorization.

1668669227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9219348.

The product of its digits is 2612736, while the sum is 53.

The square root of 1668669227 is about 40849.3479384922. The cubic root of 1668669227 is about 1186.1057709993.

The spelling of 1668669227 in words is "one billion, six hundred sixty-eight million, six hundred sixty-nine thousand, two hundred twenty-seven".