7666007660669 has 4 divisors (see below), whose sum is σ = 7913298230400. Its totient is φ = 7418717090940.

The previous prime is 7666007660653. The next prime is 7666007660711. The reversal of 7666007660669 is 9660667006667.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7666007660669 - 2⁴ = 7666007660653 is a prime.

It is a super-2 number, since 2×7666007660669² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666007660609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123645284819 + ... + 123645284880.

It is an arithmetic number, because the mean of its divisors is an integer number (1978324557600).

Almost surely, 2^{7666007660669} is an apocalyptic number.

It is an amenable number.

7666007660669 is a deficient number, since it is larger than the sum of its proper divisors (247290569731).

7666007660669 is a wasteful number, since it uses less digits than its factorization.

7666007660669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247290569730.

The product of its (nonzero) digits is 123451776, while the sum is 65.

The spelling of 7666007660669 in words is "seven trillion, six hundred sixty-six billion, seven million, six hundred sixty thousand, six hundred sixty-nine".