6660371438 has 32 divisors (see below), whose sum is σ = 11480859648. Its totient is φ = 2838722400.

The previous prime is 6660371429. The next prime is 6660371467. The reversal of 6660371438 is 8341730666.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2092208 + ... + 2095388.

It is an arithmetic number, because the mean of its divisors is an integer number (358776864).

Almost surely, 2^6660371438 is an apocalyptic number.

6660371438 is a deficient number, since it is larger than the sum of its proper divisors (4820488210).

6660371438 is a wasteful number, since it uses less digits than its factorization.

6660371438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968.

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 6660371438 is about 81611.0987427568. The cubic root of 6660371438 is about 1881.4794674998.

The spelling of 6660371438 in words is "six billion, six hundred sixty million, three hundred seventy-one thousand, four hundred thirty-eight".