6618994250 has 64 divisors (see below), whose sum is σ = 13537704960. Its totient is φ = 2403256000.

The previous prime is 6618994231. The next prime is 6618994259. The reversal of 6618994250 is 524998166.

It is a super-2 number, since 2×6618994250² = 87622169763066125000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is not an unprimeable number, because it can be changed into a prime (6618994259) 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, 2371856 + ... + 2374644.

It is an arithmetic number, because the mean of its divisors is an integer number (211526640).

Almost surely, 2^6618994250 is an apocalyptic number.

6618994250 is an abundant number, since it is smaller than the sum of its proper divisors (6918710710).

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

6618994250 is a wasteful number, since it uses less digits than its factorization.

6618994250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3680 (or 3670 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 50.

The square root of 6618994250 is about 81357.2015865836. The cubic root of 6618994250 is about 1877.5751756391.

The spelling of 6618994250 in words is "six billion, six hundred eighteen million, nine hundred ninety-four thousand, two hundred fifty".