67474816 has 32 divisors (see below), whose sum is σ = 135955800. Its totient is φ = 33352704.

The previous prime is 67474811. The next prime is 67474831. The reversal of 67474816 is 61847476.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67474811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8431 + ... + 14353.

Almost surely, 2^67474816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67474816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67977900).

67474816 is an abundant number, since it is smaller than the sum of its proper divisors (68480984).

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

67474816 is an equidigital number, since it uses as much as digits as its factorization.

67474816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6026 (or 6014 counting only the distinct ones).

The product of its digits is 225792, while the sum is 43.

The square root of 67474816 is about 8214.3055701623. The cubic root of 67474816 is about 407.1119992325. Note that the first 3 decimals are identical.

The spelling of 67474816 in words is "sixty-seven million, four hundred seventy-four thousand, eight hundred sixteen".