545756566 has 4 divisors (see below), whose sum is σ = 818634852. Its totient is φ = 272878282.

The previous prime is 545756543. The next prime is 545756567. The reversal of 545756566 is 665657545.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×545756566² = 595700458664224712, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545756567) 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, 136439140 + ... + 136439143.

It is an arithmetic number, because the mean of its divisors is an integer number (204658713).

Almost surely, 2^545756566 is an apocalyptic number.

545756566 is a deficient number, since it is larger than the sum of its proper divisors (272878286).

545756566 is a wasteful number, since it uses less digits than its factorization.

545756566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272878285.

The product of its digits is 3780000, while the sum is 49.

The square root of 545756566 is about 23361.4333036310. The cubic root of 545756566 is about 817.2087156592.

The spelling of 545756566 in words is "five hundred forty-five million, seven hundred fifty-six thousand, five hundred sixty-six".