66914013 has 4 divisors (see below), whose sum is σ = 89218688. Its totient is φ = 44609340.

The previous prime is 66913997. The next prime is 66914051. The reversal of 66914013 is 31041966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66914013 - 2⁴ = 66913997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66914413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11152333 + ... + 11152338.

It is an arithmetic number, because the mean of its divisors is an integer number (22304672).

Almost surely, 2^66914013 is an apocalyptic number.

It is an amenable number.

66914013 is a deficient number, since it is larger than the sum of its proper divisors (22304675).

66914013 is a wasteful number, since it uses less digits than its factorization.

66914013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22304674.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 66914013 is about 8180.0985935379. The cubic root of 66914013 is about 405.9809842502.

Adding to 66914013 its reverse (31041966), we get a palindrome (97955979).

The spelling of 66914013 in words is "sixty-six million, nine hundred fourteen thousand, thirteen".