67691090 has 16 divisors (see below), whose sum is σ = 123842520. Its totient is φ = 26632320.

The previous prime is 67691087. The next prime is 67691101. The reversal of 67691090 is 9019676.

It can be written as a sum of positive squares in 4 ways, for example, as 21464689 + 46226401 = 4633^2 + 6799^2 .

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, 54875 + ... + 56094.

Almost surely, 2^67691090 is an apocalyptic number.

67691090 is a deficient number, since it is larger than the sum of its proper divisors (56151430).

67691090 is a wasteful number, since it uses less digits than its factorization.

67691090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111037.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 67691090 is about 8227.4595106874. The cubic root of 67691090 is about 407.5465012737.

The spelling of 67691090 in words is "sixty-seven million, six hundred ninety-one thousand, ninety".