2756549666 has 8 divisors (see below), whose sum is σ = 4452887964. Its totient is φ = 1272253680.

The previous prime is 2756549647. The next prime is 2756549669. The reversal of 2756549666 is 6669456572.

It can be written as a sum of positive squares in 2 ways, for example, as 2639801641 + 116748025 = 51379^2 + 10805^2 .

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

It is a super-2 number, since 2×2756549666² = 15197132122249423112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2756549669) 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, 53010545 + ... + 53010596.

Almost surely, 2^2756549666 is an apocalyptic number.

2756549666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2756549666 is a deficient number, since it is larger than the sum of its proper divisors (1696338298).

2756549666 is a wasteful number, since it uses less digits than its factorization.

2756549666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106021156.

The product of its digits is 16329600, while the sum is 56.

The square root of 2756549666 is about 52502.8538843366. The cubic root of 2756549666 is about 1402.1310514498.

The spelling of 2756549666 in words is "two billion, seven hundred fifty-six million, five hundred forty-nine thousand, six hundred sixty-six".