66165110650 has 24 divisors (see below), whose sum is σ = 123081809760. Its totient is φ = 26462882160.

The previous prime is 66165110633. The next prime is 66165110653. The reversal of 66165110650 is 5601156166.

It is not an unprimeable number, because it can be changed into a prime (66165110653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 368731 + ... + 517969.

It is an arithmetic number, because the mean of its divisors is an integer number (5128408740).

Almost surely, 2^66165110650 is an apocalyptic number.

66165110650 is a deficient number, since it is larger than the sum of its proper divisors (56916699110).

66165110650 is a wasteful number, since it uses less digits than its factorization.

66165110650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158118 (or 158113 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 66165110650 in words is "sixty-six billion, one hundred sixty-five million, one hundred ten thousand, six hundred fifty".