67221407 has 8 divisors (see below), whose sum is σ = 73639632. Its totient is φ = 60854400.

The previous prime is 67221403. The next prime is 67221419. The reversal of 67221407 is 70412276.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67221407 - 2² = 67221403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67221407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67221403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10028 + ... + 15329.

It is an arithmetic number, because the mean of its divisors is an integer number (9204954).

Almost surely, 2^67221407 is an apocalyptic number.

67221407 is a deficient number, since it is larger than the sum of its proper divisors (6418225).

67221407 is a wasteful number, since it uses less digits than its factorization.

67221407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25609.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 67221407 is about 8198.8662021038. The cubic root of 67221407 is about 406.6017087712.

The spelling of 67221407 in words is "sixty-seven million, two hundred twenty-one thousand, four hundred seven".