67665706 has 8 divisors (see below), whose sum is σ = 101562084. Its totient is φ = 33811680.

The previous prime is 67665691. The next prime is 67665709. The reversal of 67665706 is 60756676.

It can be written as a sum of positive squares in 2 ways, for example, as 44769481 + 22896225 = 6691^2 + 4785^2 .

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

It is not an unprimeable number, because it can be changed into a prime (67665709) 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, 6235 + ... + 13198.

Almost surely, 2^67665706 is an apocalyptic number.

67665706 is a deficient number, since it is larger than the sum of its proper divisors (33896378).

67665706 is a wasteful number, since it uses less digits than its factorization.

67665706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21176.

The product of its (nonzero) digits is 317520, while the sum is 43.

The square root of 67665706 is about 8225.9167270281. The cubic root of 67665706 is about 407.4955519105.

The spelling of 67665706 in words is "sixty-seven million, six hundred sixty-five thousand, seven hundred six".