67675991 has 2 divisors, whose sum is σ = 67675992. Its totient is φ = 67675990.

The previous prime is 67675987. The next prime is 67676033. The reversal of 67675991 is 19957676.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67675991 - 2² = 67675987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67671991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33837995 + 33837996.

It is an arithmetic number, because the mean of its divisors is an integer number (33837996).

Almost surely, 2^67675991 is an apocalyptic number.

67675991 is a deficient number, since it is larger than the sum of its proper divisors (1).

67675991 is an equidigital number, since it uses as much as digits as its factorization.

67675991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 714420, while the sum is 50.

The square root of 67675991 is about 8226.5418615601. The cubic root of 67675991 is about 407.5161969298.

It can be divided in two parts, 676 and 75991, that added together give a palindrome (76667).

The spelling of 67675991 in words is "sixty-seven million, six hundred seventy-five thousand, nine hundred ninety-one".