67166901887 has 2 divisors, whose sum is σ = 67166901888. Its totient is φ = 67166901886.

The previous prime is 67166901877. The next prime is 67166901911. The reversal of 67166901887 is 78810966176.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67166901887 is a prime.

It is a super-2 number, since 2×67166901887² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67166901847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33583450943 + 33583450944.

It is an arithmetic number, because the mean of its divisors is an integer number (33583450944).

Almost surely, 2^67166901887 is an apocalyptic number.

67166901887 is a deficient number, since it is larger than the sum of its proper divisors (1).

67166901887 is an equidigital number, since it uses as much as digits as its factorization.

67166901887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6096384, while the sum is 59.

The spelling of 67166901887 in words is "sixty-seven billion, one hundred sixty-six million, nine hundred one thousand, eight hundred eighty-seven".