67669967 has 4 divisors (see below), whose sum is σ = 69320496. Its totient is φ = 66019440.

The previous prime is 67669949. The next prime is 67669997. The reversal of 67669967 is 76996676.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 67669967 - 2¹⁰ = 67668943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67669907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 825203 + ... + 825284.

It is an arithmetic number, because the mean of its divisors is an integer number (17330124).

Almost surely, 2^67669967 is an apocalyptic number.

67669967 is a deficient number, since it is larger than the sum of its proper divisors (1650529).

67669967 is a wasteful number, since it uses less digits than its factorization.

67669967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650528.

The product of its digits is 5143824, while the sum is 56.

The square root of 67669967 is about 8226.1757214395. The cubic root of 67669967 is about 407.5041052443.

The spelling of 67669967 in words is "sixty-seven million, six hundred sixty-nine thousand, nine hundred sixty-seven".