67686992 has 20 divisors (see below), whose sum is σ = 132619860. Its totient is φ = 33462528.

The previous prime is 67686991. The next prime is 67687001. The reversal of 67686992 is 29968676.

It can be written as a sum of positive squares in 2 ways, for example, as 47831056 + 19855936 = 6916^2 + 4456^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67686991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22343 + ... + 25190.

It is an arithmetic number, because the mean of its divisors is an integer number (6630993).

Almost surely, 2^67686992 is an apocalyptic number.

It is an amenable number.

67686992 is a deficient number, since it is larger than the sum of its proper divisors (64932868).

67686992 is a wasteful number, since it uses less digits than its factorization.

67686992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47630 (or 47624 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 53.

The square root of 67686992 is about 8227.2104628483. The cubic root of 67686992 is about 407.5382768567.

It can be divided in two parts, 6768 and 6992, that multiplied together give a triangular number (47321856 = T₉₇₂₈).

The spelling of 67686992 in words is "sixty-seven million, six hundred eighty-six thousand, nine hundred ninety-two".