67381408 has 12 divisors (see below), whose sum is σ = 132657210. Its totient is φ = 33690688.

The previous prime is 67381399. The next prime is 67381411. The reversal of 67381408 is 80418376.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 63170704 + 4210704 = 7948^2 + 2052^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052803 + ... + 1052866.

Almost surely, 2^67381408 is an apocalyptic number.

It is an amenable number.

67381408 is a deficient number, since it is larger than the sum of its proper divisors (65275802).

67381408 is a wasteful number, since it uses less digits than its factorization.

67381408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105679 (or 2105671 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 67381408 is about 8208.6179104646. The cubic root of 67381408 is about 406.9240521778.

The spelling of 67381408 in words is "sixty-seven million, three hundred eighty-one thousand, four hundred eight".