548766661 has 4 divisors (see below), whose sum is σ = 549193024. Its totient is φ = 548340300.

The previous prime is 548766577. The next prime is 548766671. The reversal of 548766661 is 166667845.

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 a cyclic number.

It is not a de Polignac number, because 548766661 - 2²¹ = 546669509 is a prime.

It is a super-2 number, since 2×548766661² = 602289696450177842, 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 (548766671) 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, 211245 + ... + 213826.

It is an arithmetic number, because the mean of its divisors is an integer number (137298256).

Almost surely, 2^548766661 is an apocalyptic number.

It is an amenable number.

548766661 is a deficient number, since it is larger than the sum of its proper divisors (426363).

548766661 is a wasteful number, since it uses less digits than its factorization.

548766661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426362.

The product of its digits is 1451520, while the sum is 49.

The square root of 548766661 is about 23425.7691656005. The cubic root of 548766661 is about 818.7083874817.

The spelling of 548766661 in words is "five hundred forty-eight million, seven hundred sixty-six thousand, six hundred sixty-one".