67640075 has 12 divisors (see below), whose sum is σ = 85825608. Its totient is φ = 52852800.

The previous prime is 67640063. The next prime is 67640077. The reversal of 67640075 is 57004676.

It is not a de Polignac number, because 67640075 - 2¹⁶ = 67574539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67640077) 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, 30386 + ... + 32535.

It is an arithmetic number, because the mean of its divisors is an integer number (7152134).

Almost surely, 2^67640075 is an apocalyptic number.

67640075 is a deficient number, since it is larger than the sum of its proper divisors (18185533).

67640075 is a wasteful number, since it uses less digits than its factorization.

67640075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62974 (or 62969 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 67640075 is about 8224.3586376082. The cubic root of 67640075 is about 407.4440938522. Note that the first 3 decimals are identical.

The spelling of 67640075 in words is "sixty-seven million, six hundred forty thousand, seventy-five".