55663774 has 4 divisors (see below), whose sum is σ = 83495664. Its totient is φ = 27831886.

The previous prime is 55663771. The next prime is 55663807. The reversal of 55663774 is 47736655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47736655 = 5 ⋅9547331.

It is a self number, because there is not a number n which added to its sum of digits gives 55663774.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55663771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13915942 + ... + 13915945.

It is an arithmetic number, because the mean of its divisors is an integer number (20873916).

Almost surely, 2^55663774 is an apocalyptic number.

55663774 is a deficient number, since it is larger than the sum of its proper divisors (27831890).

55663774 is a wasteful number, since it uses less digits than its factorization.

55663774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27831889.

The product of its digits is 529200, while the sum is 43.

The square root of 55663774 is about 7460.8159071244. The cubic root of 55663774 is about 381.8190118755.

The spelling of 55663774 in words is "fifty-five million, six hundred sixty-three thousand, seven hundred seventy-four".