1669090811 has 2 divisors, whose sum is σ = 1669090812. Its totient is φ = 1669090810.

The previous prime is 1669090727. The next prime is 1669090847. The reversal of 1669090811 is 1180909661.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1180909661) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1180606991 and 1996060811.

It is a cyclic number.

It is not a de Polignac number, because 1669090811 - 2¹⁴ = 1669074427 is a prime.

It is not a weakly prime, because it can be changed into another prime (1669090211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834545405 + 834545406.

It is an arithmetic number, because the mean of its divisors is an integer number (834545406).

Almost surely, 2^1669090811 is an apocalyptic number.

1669090811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669090811 is an equidigital number, since it uses as much as digits as its factorization.

1669090811 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 1669090811 is about 40854.5078418527. The cubic root of 1669090811 is about 1186.2056512116.

The spelling of 1669090811 in words is "one billion, six hundred sixty-nine million, ninety thousand, eight hundred eleven".