66392420 has 12 divisors (see below), whose sum is σ = 139424124. Its totient is φ = 26556960.

The previous prime is 66392419. The next prime is 66392423. The reversal of 66392420 is 2429366.

66392420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 14868736 + 51523684 = 3856^2 + 7178^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (66392423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1659791 + ... + 1659830.

It is an arithmetic number, because the mean of its divisors is an integer number (11618677).

Almost surely, 2^66392420 is an apocalyptic number.

It is an amenable number.

66392420 is an abundant number, since it is smaller than the sum of its proper divisors (73031704).

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

66392420 is a wasteful number, since it uses less digits than its factorization.

66392420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3319630 (or 3319628 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 66392420 is about 8148.1543922535. The cubic root of 66392420 is about 404.9233610001.

The spelling of 66392420 in words is "sixty-six million, three hundred ninety-two thousand, four hundred twenty".