1669674961 has 2 divisors, whose sum is σ = 1669674962. Its totient is φ = 1669674960.

The previous prime is 1669674943. The next prime is 1669674967. The reversal of 1669674961 is 1694769661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1347257025 + 322417936 = 36705^2 + 17956^2 .

It is a cyclic number.

It is not a de Polignac number, because 1669674961 - 2⁷ = 1669674833 is a prime.

It is not a weakly prime, because it can be changed into another prime (1669674967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834837480 + 834837481.

It is an arithmetic number, because the mean of its divisors is an integer number (834837481).

Almost surely, 2^1669674961 is an apocalyptic number.

It is an amenable number.

1669674961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669674961 is an equidigital number, since it uses as much as digits as its factorization.

1669674961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 55.

The square root of 1669674961 is about 40861.6563663295. The cubic root of 1669674961 is about 1186.3440182007.

The spelling of 1669674961 in words is "one billion, six hundred sixty-nine million, six hundred seventy-four thousand, nine hundred sixty-one".