67666806 has 16 divisors (see below), whose sum is σ = 150370800. Its totient is φ = 22555584.

The previous prime is 67666799. The next prime is 67666811. The reversal of 67666806 is 60866676.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 626491 + ... + 626598.

It is an arithmetic number, because the mean of its divisors is an integer number (9398175).

Almost surely, 2^67666806 is an apocalyptic number.

67666806 is an abundant number, since it is smaller than the sum of its proper divisors (82703994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67666806 is a wasteful number, since it uses less digits than its factorization.

67666806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253100 (or 1253094 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 67666806 is about 8225.9835886051. The cubic root of 67666806 is about 407.4977600339.

The spelling of 67666806 in words is "sixty-seven million, six hundred sixty-six thousand, eight hundred six".