7866669974400 has 240 divisors, whose sum is σ = 29029743101040. Its totient is φ = 2097778590720.

The previous prime is 7866669974377. The next prime is 7866669974419. The reversal of 7866669974400 is 44799666687.

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

It is a super-2 number, since 2×7866669974400² (a number of 27 digits) contains 22 as substring.

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 29 ways as a sum of consecutive naturals, for example, 14915704 + ... + 15434103.

It is an arithmetic number, because the mean of its divisors is an integer number (120957262921).

Almost surely, 2^{7866669974400} is an apocalyptic number.

It is an amenable number.

7866669974400 is an abundant number, since it is smaller than the sum of its proper divisors (21163073126640).

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

7866669974400 is a wasteful number, since it uses less digits than its factorization.

7866669974400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30349843 (or 30349817 counting only the distinct ones).

The product of its (nonzero) digits is 658409472, while the sum is 72.

The spelling of 7866669974400 in words is "seven trillion, eight hundred sixty-six billion, six hundred sixty-nine million, nine hundred seventy-four thousand, four hundred".