66427267 has 4 divisors (see below), whose sum is σ = 66539880. Its totient is φ = 66314656.

The previous prime is 66427261. The next prime is 66427271. The reversal of 66427267 is 76272466.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66427267 - 2³ = 66427259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66427261) 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, 55417 + ... + 56602.

It is an arithmetic number, because the mean of its divisors is an integer number (16634970).

Almost surely, 2^66427267 is an apocalyptic number.

66427267 is a deficient number, since it is larger than the sum of its proper divisors (112613).

66427267 is a wasteful number, since it uses less digits than its factorization.

66427267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112612.

The product of its digits is 169344, while the sum is 40.

The square root of 66427267 is about 8150.2924487407. The cubic root of 66427267 is about 404.9941918590.

The spelling of 66427267 in words is "sixty-six million, four hundred twenty-seven thousand, two hundred sixty-seven".