66073020 has 192 divisors, whose sum is σ = 216760320. Its totient is φ = 14902272.

The previous prime is 66073019. The next prime is 66073037. The reversal of 66073020 is 2037066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 520197 + ... + 520323.

It is an arithmetic number, because the mean of its divisors is an integer number (1128960).

Almost surely, 2^66073020 is an apocalyptic number.

66073020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66073020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108380160).

66073020 is an abundant number, since it is smaller than the sum of its proper divisors (150687300).

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

66073020 is a wasteful number, since it uses less digits than its factorization.

66073020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 66073020 is about 8128.5312326398. The cubic root of 66073020 is about 404.2729831668.

The spelling of 66073020 in words is "sixty-six million, seventy-three thousand, twenty".