67500945 has 20 divisors (see below), whose sum is σ = 121002420. Its totient is φ = 36000288.

The previous prime is 67500887. The next prime is 67500949. The reversal of 67500945 is 54900576.

67500945 is a `hidden beast` number, since 67 + 500 + 94 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 33593616 + 33907329 = 5796^2 + 5823^2 .

It is not a de Polignac number, because 67500945 - 2¹⁰ = 67499921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67500949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 82930 + ... + 83739.

It is an arithmetic number, because the mean of its divisors is an integer number (6050121).

Almost surely, 2^67500945 is an apocalyptic number.

It is an amenable number.

67500945 is a deficient number, since it is larger than the sum of its proper divisors (53501475).

67500945 is a wasteful number, since it uses less digits than its factorization.

67500945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166686 (or 166677 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 67500945 is about 8215.8958732447. The cubic root of 67500945 is about 407.1645425727.

The spelling of 67500945 in words is "sixty-seven million, five hundred thousand, nine hundred forty-five".