67312818 has 24 divisors (see below), whose sum is σ = 145995408. Its totient is φ = 22414392.

The previous prime is 67312813. The next prime is 67312853. The reversal of 67312818 is 81821376.

It is a super-2 number, since 2×67312818² = 9062030934202248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67312813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32605 + ... + 34607.

It is an arithmetic number, because the mean of its divisors is an integer number (6083142).

Almost surely, 2^67312818 is an apocalyptic number.

67312818 is an abundant number, since it is smaller than the sum of its proper divisors (78682590).

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

67312818 is a wasteful number, since it uses less digits than its factorization.

67312818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3878 (or 3875 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 67312818 is about 8204.4389204869. The cubic root of 67312818 is about 406.7859310084.

The spelling of 67312818 in words is "sixty-seven million, three hundred twelve thousand, eight hundred eighteen".