66600450036 has 144 divisors (see below), whose sum is σ = 180596183040. Its totient is φ = 20633149440.

The previous prime is 66600450029. The next prime is 66600450041. The reversal of 66600450036 is 63005400666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9633421 + ... + 9640331.

It is an arithmetic number, because the mean of its divisors is an integer number (1254140160).

Almost surely, 2^66600450036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66600450036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90298091520).

66600450036 is an abundant number, since it is smaller than the sum of its proper divisors (113995733004).

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

66600450036 is a wasteful number, since it uses less digits than its factorization.

66600450036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7206 (or 7201 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

It can be divided in two parts, 66600 and 450036, that added together give a triangular number (516636 = T₁₀₁₆).

The spelling of 66600450036 in words is "sixty-six billion, six hundred million, four hundred fifty thousand, thirty-six".