66501616050 has 36 divisors (see below), whose sum is σ = 178667676330. Its totient is φ = 17733764160.

The previous prime is 66501616043. The next prime is 66501616061. The reversal of 66501616050 is 5061610566.

It can be written as a sum of positive squares in 3 ways, for example, as 48700986489 + 17800629561 = 220683^2 + 133419^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66501615996 and 66501616014.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 73890235 + ... + 73891134.

Almost surely, 2^66501616050 is an apocalyptic number.

66501616050 is an abundant number, since it is smaller than the sum of its proper divisors (112166060280).

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

66501616050 is a wasteful number, since it uses less digits than its factorization.

66501616050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147781387 (or 147781379 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 66501616050 in words is "sixty-six billion, five hundred one million, six hundred sixteen thousand, fifty".