66370420 has 24 divisors (see below), whose sum is σ = 146714400. Its totient is φ = 25150752.

The previous prime is 66370393. The next prime is 66370429. The reversal of 66370420 is 2407366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66370429) 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, 86950 + ... + 87709.

It is an arithmetic number, because the mean of its divisors is an integer number (6113100).

Almost surely, 2^66370420 is an apocalyptic number.

It is an amenable number.

66370420 is an abundant number, since it is smaller than the sum of its proper divisors (80343980).

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

66370420 is a wasteful number, since it uses less digits than its factorization.

66370420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174687 (or 174685 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 66370420 is about 8146.8042814345. The cubic root of 66370420 is about 404.8786305018.

Adding to 66370420 its reverse (2407366), we get a palindrome (68777786).

The spelling of 66370420 in words is "sixty-six million, three hundred seventy thousand, four hundred twenty".