66056065450 has 36 divisors (see below), whose sum is σ = 124093762290. Its totient is φ = 26160616000.

The previous prime is 66056065403. The next prime is 66056065477. The reversal of 66056065450 is 5456065066.

It can be written as a sum of positive squares in 9 ways, for example, as 48769863921 + 17286201529 = 220839^2 + 131477^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66056065397 and 66056065406.

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, 445296 + ... + 574804.

Almost surely, 2^66056065450 is an apocalyptic number.

66056065450 is a deficient number, since it is larger than the sum of its proper divisors (58037696840).

66056065450 is a wasteful number, since it uses less digits than its factorization.

66056065450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129723 (or 129617 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 66056065450 in words is "sixty-six billion, fifty-six million, sixty-five thousand, four hundred fifty".