67985785 has 12 divisors (see below), whose sum is σ = 94902948. Its totient is φ = 46618656.

The previous prime is 67985779. The next prime is 67985809. The reversal of 67985785 is 58758976.

It can be written as a sum of positive squares in 2 ways, for example, as 20830096 + 47155689 = 4564^2 + 6867^2 .

It is not a de Polignac number, because 67985785 - 2¹³ = 67977593 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138502 + ... + 138991.

It is an arithmetic number, because the mean of its divisors is an integer number (7908579).

Almost surely, 2^67985785 is an apocalyptic number.

It is an amenable number.

67985785 is a deficient number, since it is larger than the sum of its proper divisors (26917163).

67985785 is a wasteful number, since it uses less digits than its factorization.

67985785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277512 (or 277505 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 55.

The square root of 67985785 is about 8245.3492952088. The cubic root of 67985785 is about 408.1370666767.

The spelling of 67985785 in words is "sixty-seven million, nine hundred eighty-five thousand, seven hundred eighty-five".