67001985 has 20 divisors (see below), whose sum is σ = 120107988. Its totient is φ = 35734176.

The previous prime is 67001969. The next prime is 67001989. The reversal of 67001985 is 58910076.

It can be written as a sum of positive squares in 2 ways, for example, as 38229489 + 28772496 = 6183^2 + 5364^2 .

It is not a de Polignac number, because 67001985 - 2⁴ = 67001969 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67001989) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 82314 + ... + 83123.

Almost surely, 2^67001985 is an apocalyptic number.

It is an amenable number.

67001985 is a deficient number, since it is larger than the sum of its proper divisors (53106003).

67001985 is a wasteful number, since it uses less digits than its factorization.

67001985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165454 (or 165445 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 67001985 is about 8185.4740241479. The cubic root of 67001985 is about 406.1588210363.

The spelling of 67001985 in words is "sixty-seven million, one thousand, nine hundred eighty-five".