67009666 has 8 divisors (see below), whose sum is σ = 100906380. Its totient is φ = 33374208.

The previous prime is 67009661. The next prime is 67009667. The reversal of 67009666 is 66690076.

It can be written as a sum of positive squares in 2 ways, for example, as 64336441 + 2673225 = 8021^2 + 1635^2 .

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 (67009661) 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, 64671 + ... + 65698.

Almost surely, 2^67009666 is an apocalyptic number.

67009666 is a deficient number, since it is larger than the sum of its proper divisors (33896714).

67009666 is a wasteful number, since it uses less digits than its factorization.

67009666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130628.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 67009666 is about 8185.9431955029. The cubic root of 67009666 is about 406.1743409083.

The spelling of 67009666 in words is "sixty-seven million, nine thousand, six hundred sixty-six".