67916785 has 8 divisors (see below), whose sum is σ = 86294376. Its totient is φ = 51137280.

The previous prime is 67916767. The next prime is 67916801. The reversal of 67916785 is 58761976.

It can be written as a sum of positive squares in 4 ways, for example, as 1461681 + 66455104 = 1209^2 + 8152^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 67916785 - 2⁹ = 67916273 is a prime.

It is a super-2 number, since 2×67916785² = 9225379369472450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399426 + ... + 399595.

It is an arithmetic number, because the mean of its divisors is an integer number (10786797).

Almost surely, 2^67916785 is an apocalyptic number.

It is an amenable number.

67916785 is a deficient number, since it is larger than the sum of its proper divisors (18377591).

67916785 is a wasteful number, since it uses less digits than its factorization.

67916785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799043.

The product of its digits is 635040, while the sum is 49.

The square root of 67916785 is about 8241.1640561270. The cubic root of 67916785 is about 407.9989447140.

The spelling of 67916785 in words is "sixty-seven million, nine hundred sixteen thousand, seven hundred eighty-five".