67665318 has 16 divisors (see below), whose sum is σ = 154663680. Its totient is φ = 19332936.

The previous prime is 67665313. The next prime is 67665319. The reversal of 67665318 is 81356676.

It is a super-2 number, since 2×67665318² = 9157190520082248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1611079 = 67665318 / (6 + 7 + 6 + 6 + 5 + 3 + 1 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 67665318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67665313) 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, 805498 + ... + 805581.

It is an arithmetic number, because the mean of its divisors is an integer number (9666480).

Almost surely, 2^67665318 is an apocalyptic number.

67665318 is an abundant number, since it is smaller than the sum of its proper divisors (86998362).

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

67665318 is a wasteful number, since it uses less digits than its factorization.

67665318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611091.

The product of its digits is 181440, while the sum is 42.

The square root of 67665318 is about 8225.8931429967. The cubic root of 67665318 is about 407.4947730395.

The spelling of 67665318 in words is "sixty-seven million, six hundred sixty-five thousand, three hundred eighteen".