54720866 has 4 divisors (see below), whose sum is σ = 82081302. Its totient is φ = 27360432.

The previous prime is 54720863. The next prime is 54720881. The reversal of 54720866 is 66802745.

It is a happy number.

54720866 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.

It can be written as a sum of positive squares in only one way, i.e., 32433025 + 22287841 = 5695^2 + 4721^2 .

It is not an unprimeable number, because it can be changed into a prime (54720863) 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 as a sum of consecutive naturals, namely, 13680215 + ... + 13680218.

Almost surely, 2^54720866 is an apocalyptic number.

54720866 is a deficient number, since it is larger than the sum of its proper divisors (27360436).

54720866 is a wasteful number, since it uses less digits than its factorization.

54720866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27360435.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 54720866 is about 7397.3553382273. The cubic root of 54720866 is about 379.6508010875.

The spelling of 54720866 in words is "fifty-four million, seven hundred twenty thousand, eight hundred sixty-six".