7755566749 has 16 divisors (see below), whose sum is σ = 8992460800. Its totient is φ = 6551226864.

The previous prime is 7755566677. The next prime is 7755566837. The reversal of 7755566749 is 9476655577.

It is a happy number.

It is not a de Polignac number, because 7755566749 - 2¹¹ = 7755564701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7755566249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289672 + ... + 315310.

It is an arithmetic number, because the mean of its divisors is an integer number (562028800).

Almost surely, 2^7755566749 is an apocalyptic number.

7755566749 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

It is an amenable number.

7755566749 is a deficient number, since it is larger than the sum of its proper divisors (1236894051).

7755566749 is a wasteful number, since it uses less digits than its factorization.

7755566749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26272.

The product of its digits is 55566000, while the sum is 61.

The square root of 7755566749 is about 88065.6956425145. The cubic root of 7755566749 is about 1979.4195105606.

The spelling of 7755566749 in words is "seven billion, seven hundred fifty-five million, five hundred sixty-six thousand, seven hundred forty-nine".