7666178929920 has 1440 divisors, whose sum is σ = 33343438157568. Its totient is φ = 1648549822464.

The previous prime is 7666178929919. The next prime is 7666178929933. The reversal of 7666178929920 is 299298716667.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2998113282 + ... + 2998115838.

Almost surely, 2^{7666178929920} is an apocalyptic number.

7666178929920 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7666178929920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16671719078784).

7666178929920 is an abundant number, since it is smaller than the sum of its proper divisors (25677259227648).

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

7666178929920 is an frugal number, since it uses more digits than its factorization.

7666178929920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629 (or 2591 counting only the distinct ones).

The product of its (nonzero) digits is 246903552, while the sum is 72.

The spelling of 7666178929920 in words is "seven trillion, six hundred sixty-six billion, one hundred seventy-eight million, nine hundred twenty-nine thousand, nine hundred twenty".