1667871667 has 16 divisors (see below), whose sum is σ = 2082643200. Its totient is φ = 1297628640.

The previous prime is 1667871643. The next prime is 1667871691. The reversal of 1667871667 is 7661787661.

It is an interprime number because it is at equal distance from previous prime (1667871643) and next prime (1667871691).

It is a de Polignac number, because none of the positive numbers 2^k-1667871667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1667871617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34309 + ... + 67177.

It is an arithmetic number, because the mean of its divisors is an integer number (130165200).

Almost surely, 2^1667871667 is an apocalyptic number.

1667871667 is a deficient number, since it is larger than the sum of its proper divisors (414771533).

1667871667 is a wasteful number, since it uses less digits than its factorization.

1667871667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33546.

The product of its digits is 3556224, while the sum is 55.

The square root of 1667871667 is about 40839.5845595912. The cubic root of 1667871667 is about 1185.9167698362.

The spelling of 1667871667 in words is "one billion, six hundred sixty-seven million, eight hundred seventy-one thousand, six hundred sixty-seven".