66424355 has 16 divisors (see below), whose sum is σ = 87311520. Its totient is φ = 48287232.

The previous prime is 66424343. The next prime is 66424357. The reversal of 66424355 is 55342466.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66424355 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66424357) 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, 11009 + ... + 15938.

It is an arithmetic number, because the mean of its divisors is an integer number (5456970).

Almost surely, 2^66424355 is an apocalyptic number.

66424355 is a deficient number, since it is larger than the sum of its proper divisors (20887165).

66424355 is a wasteful number, since it uses less digits than its factorization.

66424355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26998.

The product of its digits is 86400, while the sum is 35.

The square root of 66424355 is about 8150.1138028864. The cubic root of 66424355 is about 404.9882738057.

The spelling of 66424355 in words is "sixty-six million, four hundred twenty-four thousand, three hundred fifty-five".