66655413 has 16 divisors (see below), whose sum is σ = 107726400. Its totient is φ = 40397040.

The previous prime is 66655411. The next prime is 66655429. The reversal of 66655413 is 31455666.

It is not a de Polignac number, because 66655413 - 2¹ = 66655411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66655411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111918 + ... + 112511.

It is an arithmetic number, because the mean of its divisors is an integer number (6732900).

Almost surely, 2^66655413 is an apocalyptic number.

It is an amenable number.

66655413 is a deficient number, since it is larger than the sum of its proper divisors (41070987).

66655413 is a wasteful number, since it uses less digits than its factorization.

66655413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224449 (or 224443 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 66655413 is about 8164.2766366654. The cubic root of 66655413 is about 405.4573160630.

The spelling of 66655413 in words is "sixty-six million, six hundred fifty-five thousand, four hundred thirteen".