55066197 has 4 divisors (see below), whose sum is σ = 73421600. Its totient is φ = 36710796.

The previous prime is 55066189. The next prime is 55066211. The reversal of 55066197 is 79166055.

55066197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55066197 - 2³ = 55066189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55066177) 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 3 ways as a sum of consecutive naturals, for example, 9177697 + ... + 9177702.

It is an arithmetic number, because the mean of its divisors is an integer number (18355400).

Almost surely, 2^55066197 is an apocalyptic number.

It is an amenable number.

55066197 is a deficient number, since it is larger than the sum of its proper divisors (18355403).

55066197 is a wasteful number, since it uses less digits than its factorization.

55066197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18355402.

The product of its (nonzero) digits is 56700, while the sum is 39.

The square root of 55066197 is about 7420.6601458361. The cubic root of 55066197 is about 380.4477570539.

The spelling of 55066197 in words is "fifty-five million, sixty-six thousand, one hundred ninety-seven".