55663374 has 32 divisors (see below), whose sum is σ = 120788640. Its totient is φ = 16998912.

The previous prime is 55663367. The next prime is 55663379. The reversal of 55663374 is 47336655.

55663374 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55663374² = 6196822410127752, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55663379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8082 + ... + 13290.

It is an arithmetic number, because the mean of its divisors is an integer number (3774645).

Almost surely, 2^55663374 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55663374, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60394320).

55663374 is an abundant number, since it is smaller than the sum of its proper divisors (65125266).

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

55663374 is a wasteful number, since it uses less digits than its factorization.

55663374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5364.

The product of its digits is 226800, while the sum is 39.

The square root of 55663374 is about 7460.7891003566. The cubic root of 55663374 is about 381.8180972892.

The spelling of 55663374 in words is "fifty-five million, six hundred sixty-three thousand, three hundred seventy-four".