6606445646 has 8 divisors (see below), whose sum is σ = 9911394144. Its totient is φ = 3302647600.

The previous prime is 6606445621. The next prime is 6606445649. The reversal of 6606445646 is 6465446066.

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

It is a super-3 number, since 3×6606445646³ (a number of 30 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6606445646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6606445649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273110 + ... + 296313.

It is an arithmetic number, because the mean of its divisors is an integer number (1238924268).

Almost surely, 2^6606445646 is an apocalyptic number.

6606445646 is a deficient number, since it is larger than the sum of its proper divisors (3304948498).

6606445646 is a wasteful number, since it uses less digits than its factorization.

6606445646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575226.

The product of its (nonzero) digits is 2488320, while the sum is 47.

The square root of 6606445646 is about 81280.0445742988. The cubic root of 6606445646 is about 1876.3878929245.

The spelling of 6606445646 in words is "six billion, six hundred six million, four hundred forty-five thousand, six hundred forty-six".