6699594421690 has 8 divisors (see below), whose sum is σ = 12059269959060. Its totient is φ = 2679837768672.

The previous prime is 6699594421651. The next prime is 6699594421703. The reversal of 6699594421690 is 961244959966.

It can be written as a sum of positive squares in 2 ways, for example, as 6121007520489 + 578586901201 = 2474067^2 + 760649^2 .

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

It is a super-2 number, since 2×6699594421690² (a number of 26 digits) contains 22 as substring.

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, 334979721075 + ... + 334979721094.

Almost surely, 2^{6699594421690} is an apocalyptic number.

6699594421690 is a deficient number, since it is larger than the sum of its proper divisors (5359675537370).

6699594421690 is a wasteful number, since it uses less digits than its factorization.

6699594421690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669959442176.

The product of its (nonzero) digits is 226748160, while the sum is 70.

The spelling of 6699594421690 in words is "six trillion, six hundred ninety-nine billion, five hundred ninety-four million, four hundred twenty-one thousand, six hundred ninety".