54121666 has 8 divisors (see below), whose sum is σ = 81652284. Its totient is φ = 26904240.

The previous prime is 54121663. The next prime is 54121699. The reversal of 54121666 is 66612145.

54121666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 53363025 + 758641 = 7305^2 + 871^2 .

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

It is not an unprimeable number, because it can be changed into a prime (54121663) 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, 77865 + ... + 78556.

Almost surely, 2^54121666 is an apocalyptic number.

54121666 is a deficient number, since it is larger than the sum of its proper divisors (27530618).

54121666 is a wasteful number, since it uses less digits than its factorization.

54121666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156596.

The product of its digits is 8640, while the sum is 31.

The square root of 54121666 is about 7356.7428934278. The cubic root of 54121666 is about 378.2599715872.

The spelling of 54121666 in words is "fifty-four million, one hundred twenty-one thousand, six hundred sixty-six".