66266913 has 8 divisors (see below), whose sum is σ = 90410848. Its totient is φ = 43150464.

The previous prime is 66266909. The next prime is 66266917. The reversal of 66266913 is 31966266.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66266909) and next prime (66266917).

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

It is not a de Polignac number, because 66266913 - 2² = 66266909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66266917) 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, 256720 + ... + 256977.

It is an arithmetic number, because the mean of its divisors is an integer number (11301356).

Almost surely, 2^66266913 is an apocalyptic number.

It is an amenable number.

66266913 is a deficient number, since it is larger than the sum of its proper divisors (24143935).

66266913 is a wasteful number, since it uses less digits than its factorization.

66266913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513743.

The product of its digits is 69984, while the sum is 39.

The square root of 66266913 is about 8140.4491890804. The cubic root of 66266913 is about 404.6680468469.

The spelling of 66266913 in words is "sixty-six million, two hundred sixty-six thousand, nine hundred thirteen".