7666606501 has 8 divisors (see below), whose sum is σ = 8131662360. Its totient is φ = 7203115008.

The previous prime is 7666606481. The next prime is 7666606513. The reversal of 7666606501 is 1056066667.

It can be written as a sum of positive squares in 4 ways, for example, as 3512932900 + 4153673601 = 59270^2 + 64449^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7666606501 - 2⁵ = 7666606469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666606601) 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 7 ways as a sum of consecutive naturals, for example, 380986 + ... + 400603.

It is an arithmetic number, because the mean of its divisors is an integer number (1016457795).

Almost surely, 2^7666606501 is an apocalyptic number.

It is an amenable number.

7666606501 is a deficient number, since it is larger than the sum of its proper divisors (465055859).

7666606501 is a wasteful number, since it uses less digits than its factorization.

7666606501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782183.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 7666606501 is about 87559.1600062495. The cubic root of 7666606501 is about 1971.8220751201.

The spelling of 7666606501 in words is "seven billion, six hundred sixty-six million, six hundred six thousand, five hundred one".