66687267 has 8 divisors (see below), whose sum is σ = 88954560. Its totient is φ = 44439080.

The previous prime is 66687259. The next prime is 66687301. The reversal of 66687267 is 76278666.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66687267 - 2³ = 66687259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66687217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9292 + ... + 14822.

It is an arithmetic number, because the mean of its divisors is an integer number (11119320).

Almost surely, 2^66687267 is an apocalyptic number.

66687267 is a deficient number, since it is larger than the sum of its proper divisors (22267293).

66687267 is a wasteful number, since it uses less digits than its factorization.

66687267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9553.

The product of its digits is 1016064, while the sum is 48.

The square root of 66687267 is about 8166.2272194692. The cubic root of 66687267 is about 405.5218938666.

The spelling of 66687267 in words is "sixty-six million, six hundred eighty-seven thousand, two hundred sixty-seven".