66064020 has 96 divisors (see below), whose sum is σ = 203212800. Its totient is φ = 15903360.

The previous prime is 66063983. The next prime is 66064043. The reversal of 66064020 is 2046066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131089 + ... + 131591.

It is an arithmetic number, because the mean of its divisors is an integer number (2116800).

Almost surely, 2^66064020 is an apocalyptic number.

66064020 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 66064020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101606400).

66064020 is an abundant number, since it is smaller than the sum of its proper divisors (137148780).

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

66064020 is a wasteful number, since it uses less digits than its factorization.

66064020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725 (or 723 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 66064020 is about 8127.9776082369. The cubic root of 66064020 is about 404.2546265967.

The spelling of 66064020 in words is "sixty-six million, sixty-four thousand, twenty".