548748661 has 8 divisors (see below), whose sum is σ = 582415704. Its totient is φ = 515235840.

The previous prime is 548748653. The next prime is 548748677. The reversal of 548748661 is 166847845.

It can be written as a sum of positive squares in 4 ways, for example, as 4972900 + 543775761 = 2230^2 + 23319^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 548748661 - 2³ = 548748653 is a prime.

It is a super-2 number, since 2×548748661² = 602250185898585842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (548748611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31180 + ... + 45493.

It is an arithmetic number, because the mean of its divisors is an integer number (72801963).

Almost surely, 2^548748661 is an apocalyptic number.

It is an amenable number.

548748661 is a deficient number, since it is larger than the sum of its proper divisors (33667043).

548748661 is a wasteful number, since it uses less digits than its factorization.

548748661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77111.

The product of its digits is 1290240, while the sum is 49.

The square root of 548748661 is about 23425.3849701558. The cubic root of 548748661 is about 818.6994359466.

The spelling of 548748661 in words is "five hundred forty-eight million, seven hundred forty-eight thousand, six hundred sixty-one".