66846913 has 8 divisors (see below), whose sum is σ = 76910400. Its totient is φ = 56911920.

The previous prime is 66846889. The next prime is 66846917. The reversal of 66846913 is 31964866.

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 66846913 - 2¹³ = 66838721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66846913.

It is not an unprimeable number, because it can be changed into a prime (66846917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31003 + ... + 33088.

It is an arithmetic number, because the mean of its divisors is an integer number (9613800).

Almost surely, 2^66846913 is an apocalyptic number.

It is an amenable number.

66846913 is a deficient number, since it is larger than the sum of its proper divisors (10063487).

66846913 is a wasteful number, since it uses less digits than its factorization.

66846913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64247.

The product of its digits is 186624, while the sum is 43.

The square root of 66846913 is about 8175.9961472594. The cubic root of 66846913 is about 405.8452357296.

The spelling of 66846913 in words is "sixty-six million, eight hundred forty-six thousand, nine hundred thirteen".