6866497440 has 192 divisors, whose sum is σ = 26217717120. Its totient is φ = 1664593920.

The previous prime is 6866497439. The next prime is 6866497447. The reversal of 6866497440 is 447946686.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (6866497447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24729 + ... + 119768.

It is an arithmetic number, because the mean of its divisors is an integer number (136550610).

Almost surely, 2^6866497440 is an apocalyptic number.

6866497440 is a gapful number since it is divisible by the number (60) 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 6866497440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13108858560).

6866497440 is an abundant number, since it is smaller than the sum of its proper divisors (19351219680).

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

6866497440 is a wasteful number, since it uses less digits than its factorization.

6866497440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144532 (or 144518 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 54.

The square root of 6866497440 is about 82864.3315305204. The cubic root of 6866497440 is about 1900.6920323074.

The spelling of 6866497440 in words is "six billion, eight hundred sixty-six million, four hundred ninety-seven thousand, four hundred forty".