67686949 has 16 divisors (see below), whose sum is σ = 79836480. Its totient is φ = 56712960.

The previous prime is 67686943. The next prime is 67686959. The reversal of 67686949 is 94968676.

It is a cyclic number.

It is not a de Polignac number, because 67686949 - 2⁵ = 67686917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67686949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67686943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3357 + ... + 12109.

It is an arithmetic number, because the mean of its divisors is an integer number (4989780).

Almost surely, 2^67686949 is an apocalyptic number.

It is an amenable number.

67686949 is a deficient number, since it is larger than the sum of its proper divisors (12149531).

67686949 is a wasteful number, since it uses less digits than its factorization.

67686949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8820.

The product of its digits is 3919104, while the sum is 55.

The square root of 67686949 is about 8227.2078495684. The cubic root of 67686949 is about 407.5381905567.

It can be divided in two parts, 67686 and 949, that added together give a triangular number (68635 = T₃₇₀).

The spelling of 67686949 in words is "sixty-seven million, six hundred eighty-six thousand, nine hundred forty-nine".