66215455796 has 24 divisors (see below), whose sum is σ = 132480531456. Its totient is φ = 28367419680.

The previous prime is 66215455793. The next prime is 66215455837. The reversal of 66215455796 is 69755451266.

It is a super-3 number, since 3×66215455796³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66215455793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366740 + ... + 516651.

It is an arithmetic number, because the mean of its divisors is an integer number (5520022144).

Almost surely, 2^66215455796 is an apocalyptic number.

It is an amenable number.

66215455796 is an abundant number, since it is smaller than the sum of its proper divisors (66265075660).

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

66215455796 is a wasteful number, since it uses less digits than its factorization.

66215455796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886079 (or 886077 counting only the distinct ones).

The product of its digits is 13608000, while the sum is 56.

The spelling of 66215455796 in words is "sixty-six billion, two hundred fifteen million, four hundred fifty-five thousand, seven hundred ninety-six".