66019241550 has 48 divisors (see below), whose sum is σ = 163822840560. Its totient is φ = 17594903040.

The previous prime is 66019241539. The next prime is 66019241581. The reversal of 66019241550 is 5514291066.

It is a junction number, because it is equal to n+sod(n) for n = 66019241499 and 66019241508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132966 + ... + 386934.

It is an arithmetic number, because the mean of its divisors is an integer number (3412975845).

Almost surely, 2^66019241550 is an apocalyptic number.

66019241550 is an abundant number, since it is smaller than the sum of its proper divisors (97803599010).

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

66019241550 is a wasteful number, since it uses less digits than its factorization.

66019241550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255717 (or 255712 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 39.

The spelling of 66019241550 in words is "sixty-six billion, nineteen million, two hundred forty-one thousand, five hundred fifty".