669008666655 has 384 divisors, whose sum is σ = 1475265792000. Its totient is φ = 290358577152.

The previous prime is 669008666653. The next prime is 669008666663. The reversal of 669008666655 is 556666800966.

It is not a de Polignac number, because 669008666655 - 2¹ = 669008666653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 669008666592 and 669008666601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669008666653) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 663040791 + ... + 663041799.

It is an arithmetic number, because the mean of its divisors is an integer number (3841838000).

Almost surely, 2^669008666655 is an apocalyptic number.

669008666655 is an abundant number, since it is smaller than the sum of its proper divisors (806257125345).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669008666655 is a wasteful number, since it uses less digits than its factorization.

669008666655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130 (or 1104 counting only the distinct ones).

The product of its (nonzero) digits is 83980800, while the sum is 63.

The spelling of 669008666655 in words is "six hundred sixty-nine billion, eight million, six hundred sixty-six thousand, six hundred fifty-five".