669527643716 has 6 divisors (see below), whose sum is σ = 1171673376510. Its totient is φ = 334763821856.

The previous prime is 669527643709. The next prime is 669527643721. The reversal of 669527643716 is 617346725966.

669527643716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 376959160900 + 292568482816 = 613970^2 + 540896^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83690955461 + ... + 83690955468.

It is an arithmetic number, because the mean of its divisors is an integer number (195278896085).

Almost surely, 2^669527643716 is an apocalyptic number.

It is an amenable number.

669527643716 is a deficient number, since it is larger than the sum of its proper divisors (502145732794).

669527643716 is a wasteful number, since it uses less digits than its factorization.

669527643716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167381910933 (or 167381910931 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 62.

The spelling of 669527643716 in words is "six hundred sixty-nine billion, five hundred twenty-seven million, six hundred forty-three thousand, seven hundred sixteen".