6642194 has 8 divisors (see below), whose sum is σ = 10729740. Its totient is φ = 3065616.

The previous prime is 6642187. The next prime is 6642211. The reversal of 6642194 is 4912466.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6325225 + 316969 = 2515^2 + 563^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×6642194² = 88237482267272, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6642194.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127709 + ... + 127760.

Almost surely, 2^6642194 is an apocalyptic number.

6642194 is a deficient number, since it is larger than the sum of its proper divisors (4087546).

6642194 is a wasteful number, since it uses less digits than its factorization.

6642194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255484.

The product of its digits is 10368, while the sum is 32.

The square root of 6642194 is about 2577.2454287475. The cubic root of 6642194 is about 187.9766267909.

The spelling of 6642194 in words is "six million, six hundred forty-two thousand, one hundred ninety-four".