549060661 has 2 divisors, whose sum is σ = 549060662. Its totient is φ = 549060660.

The previous prime is 549060647. The next prime is 549060691. The reversal of 549060661 is 166060945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 408282436 + 140778225 = 20206^2 + 11865^2 .

It is a cyclic number.

It is not a de Polignac number, because 549060661 - 2²¹ = 546963509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 549060661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549060601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274530330 + 274530331.

It is an arithmetic number, because the mean of its divisors is an integer number (274530331).

Almost surely, 2^549060661 is an apocalyptic number.

It is an amenable number.

549060661 is a deficient number, since it is larger than the sum of its proper divisors (1).

549060661 is an equidigital number, since it uses as much as digits as its factorization.

549060661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 549060661 is about 23432.0434661598. The cubic root of 549060661 is about 818.8545681877.

The spelling of 549060661 in words is "five hundred forty-nine million, sixty thousand, six hundred sixty-one".