6866420190 has 192 divisors, whose sum is σ = 20661848064. Its totient is φ = 1425586176.

The previous prime is 6866420167. The next prime is 6866420191. The reversal of 6866420190 is 910246686.

It is a super-2 number, since 2×6866420190² = 94295452451279272200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6866420191) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3001227 + ... + 3003513.

It is an arithmetic number, because the mean of its divisors is an integer number (107613792).

Almost surely, 2^6866420190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6866420190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10330924032).

6866420190 is an abundant number, since it is smaller than the sum of its proper divisors (13795427874).

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

6866420190 is a wasteful number, since it uses less digits than its factorization.

6866420190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379 (or 2350 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 6866420190 is about 82863.8654058571. The cubic root of 6866420190 is about 1900.6849045099.

The spelling of 6866420190 in words is "six billion, eight hundred sixty-six million, four hundred twenty thousand, one hundred ninety".