165065066600656 has 10 divisors (see below), whose sum is σ = 319813566538802. Its totient is φ = 82532533300320.

The previous prime is 165065066600597. The next prime is 165065066600669. The reversal of 165065066600656 is 656006660560561.

It can be written as a sum of positive squares in only one way, i.e., 97892027521600 + 67173039079056 = 9894040^2 + 8195916^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 165065066600656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5158283331255 + ... + 5158283331286.

Almost surely, 2^{165065066600656} is an apocalyptic number.

165065066600656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165065066600656 is a deficient number, since it is larger than the sum of its proper divisors (154748499938146).

165065066600656 is a wasteful number, since it uses less digits than its factorization.

165065066600656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10316566662549 (or 10316566662543 counting only the distinct ones).

The product of its (nonzero) digits is 34992000, while the sum is 58.

The spelling of 165065066600656 in words is "one hundred sixty-five trillion, sixty-five billion, sixty-six million, six hundred thousand, six hundred fifty-six".