66420352496 has 20 divisors (see below), whose sum is σ = 132840705984. Its totient is φ = 32138880000.

The previous prime is 66420352463. The next prime is 66420352541. The reversal of 66420352496 is 69425302466.

It is a happy number.

66420352496 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 66420352496.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66955505 + ... + 66956496.

Almost surely, 2^66420352496 is an apocalyptic number.

It is an amenable number.

66420352496 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66420352496 is a wasteful number, since it uses less digits than its factorization.

66420352496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133912040 (or 133912034 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 47.

The spelling of 66420352496 in words is "sixty-six billion, four hundred twenty million, three hundred fifty-two thousand, four hundred ninety-six".