67643380 has 24 divisors (see below), whose sum is σ = 162344448. Its totient is φ = 23191968.

The previous prime is 67643371. The next prime is 67643383. The reversal of 67643380 is 8334676.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67643383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241444 + ... + 241723.

It is an arithmetic number, because the mean of its divisors is an integer number (6764352).

Almost surely, 2^67643380 is an apocalyptic number.

It is an amenable number.

67643380 is an abundant number, since it is smaller than the sum of its proper divisors (94701068).

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

67643380 is a wasteful number, since it uses less digits than its factorization.

67643380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483183 (or 483181 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 67643380 is about 8224.5595626757. The cubic root of 67643380 is about 407.4507298630.

The spelling of 67643380 in words is "sixty-seven million, six hundred forty-three thousand, three hundred eighty".