55566691416 has 192 divisors, whose sum is σ = 158079841920. Its totient is φ = 18284797440.

The previous prime is 55566691379. The next prime is 55566691417. The reversal of 55566691416 is 61419666555.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55566691417) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 97314411 + ... + 97314981.

It is an arithmetic number, because the mean of its divisors is an integer number (823332510).

Almost surely, 2^55566691416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55566691416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79039920960).

55566691416 is an abundant number, since it is smaller than the sum of its proper divisors (102513150504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55566691416 is a wasteful number, since it uses less digits than its factorization.

55566691416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148 (or 1132 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 54.

The spelling of 55566691416 in words is "fifty-five billion, five hundred sixty-six million, six hundred ninety-one thousand, four hundred sixteen".