655511666664 has 32 divisors (see below), whose sum is σ = 1638800388000. Its totient is φ = 218501059392.

The previous prime is 655511666659. The next prime is 655511666683. The reversal of 655511666664 is 466666115556.

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, 2613927 + ... + 2853705.

It is an arithmetic number, because the mean of its divisors is an integer number (51212512125).

Almost surely, 2^655511666664 is an apocalyptic number.

It is an amenable number.

655511666664 is an abundant number, since it is smaller than the sum of its proper divisors (983288721336).

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

655511666664 is a wasteful number, since it uses less digits than its factorization.

655511666664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353697 (or 353693 counting only the distinct ones).

The product of its digits is 23328000, while the sum is 57.

The spelling of 655511666664 in words is "six hundred fifty-five billion, five hundred eleven million, six hundred sixty-six thousand, six hundred sixty-four".