54666621 has 12 divisors (see below), whose sum is σ = 79702272. Its totient is φ = 36103176.

The previous prime is 54666617. The next prime is 54666641. The reversal of 54666621 is 12666645.

It is a happy number.

54666621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 54666621 - 2² = 54666617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54666641) 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 11 ways as a sum of consecutive naturals, for example, 27421 + ... + 29346.

It is an arithmetic number, because the mean of its divisors is an integer number (6641856).

Almost surely, 2^54666621 is an apocalyptic number.

It is an amenable number.

54666621 is a deficient number, since it is larger than the sum of its proper divisors (25035651).

54666621 is a wasteful number, since it uses less digits than its factorization.

54666621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56880 (or 56877 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 54666621 is about 7393.6879160538. The cubic root of 54666621 is about 379.5253098567.

The spelling of 54666621 in words is "fifty-four million, six hundred sixty-six thousand, six hundred twenty-one".