66060420 has 48 divisors (see below), whose sum is σ = 185552640. Its totient is φ = 17560576.

The previous prime is 66060391. The next prime is 66060433. The reversal of 66060420 is 2406066.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19621 + ... + 22739.

It is an arithmetic number, because the mean of its divisors is an integer number (3865680).

Almost surely, 2^66060420 is an apocalyptic number.

66060420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66060420 is an abundant number, since it is smaller than the sum of its proper divisors (119492220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66060420 is a wasteful number, since it uses less digits than its factorization.

66060420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3484 (or 3482 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 66060420 is about 8127.7561479168. The cubic root of 66060420 is about 404.2472835019.

Adding to 66060420 its reverse (2406066), we get a palindrome (68466486).

The spelling of 66060420 in words is "sixty-six million, sixty thousand, four hundred twenty".