1669080191 has 2 divisors, whose sum is σ = 1669080192. Its totient is φ = 1669080190.

The previous prime is 1669080167. The next prime is 1669080197. The reversal of 1669080191 is 1910809661.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1910809661) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1610806991 and 1996080161.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1669080191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1669080197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834540095 + 834540096.

It is an arithmetic number, because the mean of its divisors is an integer number (834540096).

Almost surely, 2^1669080191 is an apocalyptic number.

1669080191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669080191 is an equidigital number, since it uses as much as digits as its factorization.

1669080191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 1669080191 is about 40854.3778682285. The cubic root of 1669080191 is about 1186.2031353647.

The spelling of 1669080191 in words is "one billion, six hundred sixty-nine million, eighty thousand, one hundred ninety-one".