7866772711920 has 240 divisors, whose sum is σ = 26598624579072. Its totient is φ = 2083573739520.

The previous prime is 7866772711907. The next prime is 7866772711927. The reversal of 7866772711920 is 291172776687.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×7866772711920² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7866772711927) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 297621105 + ... + 297647535.

Almost surely, 2^{7866772711920} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7866772711920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13299312289536).

7866772711920 is an abundant number, since it is smaller than the sum of its proper divisors (18731851867152).

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

7866772711920 is a wasteful number, since it uses less digits than its factorization.

7866772711920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29240 (or 29231 counting only the distinct ones).

The product of its (nonzero) digits is 24893568, while the sum is 63.

The spelling of 7866772711920 in words is "seven trillion, eight hundred sixty-six billion, seven hundred seventy-two million, seven hundred eleven thousand, nine hundred twenty".