7216866780 has 24 divisors (see below), whose sum is σ = 20207227152. Its totient is φ = 1924497792.

The previous prime is 7216866739. The next prime is 7216866793. The reversal of 7216866780 is 876686127.

It is a super-2 number, since 2×7216866780² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 60140497 + ... + 60140616.

It is an arithmetic number, because the mean of its divisors is an integer number (841967798).

Almost surely, 2^7216866780 is an apocalyptic number.

It is an amenable number.

7216866780 is an abundant number, since it is smaller than the sum of its proper divisors (12990360372).

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

7216866780 is a wasteful number, since it uses less digits than its factorization.

7216866780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120281125 (or 120281123 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 51.

The square root of 7216866780 is about 84952.1440576987. The cubic root of 7216866780 is about 1932.4854356320.

The spelling of 7216866780 in words is "seven billion, two hundred sixteen million, eight hundred sixty-six thousand, seven hundred eighty".