1667838966 has 8 divisors (see below), whose sum is σ = 3335677944. Its totient is φ = 555946320.

The previous prime is 1667838961. The next prime is 1667838971. The reversal of 1667838966 is 6698387661.

It is an interprime number because it is at equal distance from previous prime (1667838961) and next prime (1667838971).

It is a sphenic number, since it is the product of 3 distinct primes.

1667838966 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667838961) 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, 138986575 + ... + 138986586.

It is an arithmetic number, because the mean of its divisors is an integer number (416959743).

Almost surely, 2^1667838966 is an apocalyptic number.

1667838966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1667838966 is a wasteful number, since it uses less digits than its factorization.

1667838966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277973166.

The product of its digits is 15676416, while the sum is 60.

The square root of 1667838966 is about 40839.1841985121. The cubic root of 1667838966 is about 1185.9090192563.

The spelling of 1667838966 in words is "one billion, six hundred sixty-seven million, eight hundred thirty-eight thousand, nine hundred sixty-six".