1667838968 has 8 divisors (see below), whose sum is σ = 3127198080. Its totient is φ = 833919480.

The previous prime is 1667838961. The next prime is 1667838971. The reversal of 1667838968 is 8698387661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1667838968.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104239928 + ... + 104239943.

It is an arithmetic number, because the mean of its divisors is an integer number (390899760).

Almost surely, 2^1667838968 is an apocalyptic number.

It is an amenable number.

1667838968 is a deficient number, since it is larger than the sum of its proper divisors (1459359112).

1667838968 is a wasteful number, since it uses less digits than its factorization.

1667838968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208479877 (or 208479873 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 62.

The square root of 1667838968 is about 40839.1842229984. The cubic root of 1667838968 is about 1185.9090197303.

The spelling of 1667838968 in words is "one billion, six hundred sixty-seven million, eight hundred thirty-eight thousand, nine hundred sixty-eight".