9766666555 has 8 divisors (see below), whose sum is σ = 11736964944. Its totient is φ = 7802023200.

The previous prime is 9766666517. The next prime is 9766666597. The reversal of 9766666555 is 5556666679.

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

It is not a de Polignac number, because 9766666555 - 2⁹ = 9766666043 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 9766666493 and 9766666502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1409956 + ... + 1416865.

It is an arithmetic number, because the mean of its divisors is an integer number (1467120618).

Almost surely, 2^9766666555 is an apocalyptic number.

9766666555 is a deficient number, since it is larger than the sum of its proper divisors (1970298389).

9766666555 is a wasteful number, since it uses less digits than its factorization.

9766666555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2827517.

The product of its digits is 61236000, while the sum is 61.

The square root of 9766666555 is about 98826.4466375271. The cubic root of 9766666555 is about 2137.5459214283.

The spelling of 9766666555 in words is "nine billion, seven hundred sixty-six million, six hundred sixty-six thousand, five hundred fifty-five".