6646995000 has 320 divisors, whose sum is σ = 23533092000. Its totient is φ = 1737216000.

The previous prime is 6646994987. The next prime is 6646995013. The reversal of 6646995000 is 5996466.

It is an interprime number because it is at equal distance from previous prime (6646994987) and next prime (6646995013).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7154536 + ... + 7155464.

Almost surely, 2^6646995000 is an apocalyptic number.

6646995000 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 6646995000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11766546000).

6646995000 is an abundant number, since it is smaller than the sum of its proper divisors (16886097000).

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

6646995000 is a wasteful number, since it uses less digits than its factorization.

6646995000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017 (or 992 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 6646995000 is about 81529.1052324260. The cubic root of 6646995000 is about 1880.2190592786.

The spelling of 6646995000 in words is "six billion, six hundred forty-six million, nine hundred ninety-five thousand".