66020413 has 8 divisors (see below), whose sum is σ = 66860640. Its totient is φ = 65185680.

The previous prime is 66020411. The next prime is 66020417. The reversal of 66020413 is 31402066.

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 66020413 - 2¹ = 66020411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66020411) 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 7 ways as a sum of consecutive naturals, for example, 26178 + ... + 28588.

It is an arithmetic number, because the mean of its divisors is an integer number (8357580).

Almost surely, 2^66020413 is an apocalyptic number.

It is an amenable number.

66020413 is a deficient number, since it is larger than the sum of its proper divisors (840227).

66020413 is a wasteful number, since it uses less digits than its factorization.

66020413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2747.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 66020413 is about 8125.2946408115. The cubic root of 66020413 is about 404.1656613194.

Adding to 66020413 its reverse (31402066), we get a palindrome (97422479).

The spelling of 66020413 in words is "sixty-six million, twenty thousand, four hundred thirteen".