6556694754406 has 4 divisors (see below), whose sum is σ = 9835042131612. Its totient is φ = 3278347377202.

The previous prime is 6556694754403. The next prime is 6556694754473. The reversal of 6556694754406 is 6044574966556.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×6556694754406³ (a number of 39 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6556694754403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1639173688600 + ... + 1639173688603.

It is an arithmetic number, because the mean of its divisors is an integer number (2458760532903).

Almost surely, 2^{6556694754406} is an apocalyptic number.

6556694754406 is a deficient number, since it is larger than the sum of its proper divisors (3278347377206).

6556694754406 is a wasteful number, since it uses less digits than its factorization.

6556694754406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3278347377205.

The product of its (nonzero) digits is 653184000, while the sum is 67.

The spelling of 6556694754406 in words is "six trillion, five hundred fifty-six billion, six hundred ninety-four million, seven hundred fifty-four thousand, four hundred six".