66820435032 has 64 divisors (see below), whose sum is σ = 180302220000. Its totient is φ = 20514299904.

The previous prime is 66820435021. The next prime is 66820435043. The reversal of 66820435032 is 23053402866.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66820435021) and next prime (66820435043).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

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, 98407 + ... + 378582.

Almost surely, 2^66820435032 is an apocalyptic number.

It is an amenable number.

66820435032 is an abundant number, since it is smaller than the sum of its proper divisors (113481784968).

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

66820435032 is a wasteful number, since it uses less digits than its factorization.

66820435032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477460 (or 477456 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 39.

Adding to 66820435032 its reverse (23053402866), we get a palindrome (89873837898).

The spelling of 66820435032 in words is "sixty-six billion, eight hundred twenty million, four hundred thirty-five thousand, thirty-two".