16656778414 has 8 divisors (see below), whose sum is σ = 25456586040. Its totient is φ = 8171249736.

The previous prime is 16656778409. The next prime is 16656778493. The reversal of 16656778414 is 41487765661.

It is a happy number.

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

It is a congruent number.

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, 78569604 + ... + 78569815.

It is an arithmetic number, because the mean of its divisors is an integer number (3182073255).

Almost surely, 2^16656778414 is an apocalyptic number.

16656778414 is a deficient number, since it is larger than the sum of its proper divisors (8799807626).

16656778414 is a wasteful number, since it uses less digits than its factorization.

16656778414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157139474.

The product of its digits is 6773760, while the sum is 55.

The spelling of 16656778414 in words is "sixteen billion, six hundred fifty-six million, seven hundred seventy-eight thousand, four hundred fourteen".