66020526 has 72 divisors (see below), whose sum is σ = 169061256. Its totient is φ = 18457920.

The previous prime is 66020519. The next prime is 66020551. The reversal of 66020526 is 62502066.

66020526 is a `hidden beast` number, since 6 + 602 + 0 + 52 + 6 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66020526.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 32476 + ... + 34448.

It is an arithmetic number, because the mean of its divisors is an integer number (2348073).

Almost surely, 2^66020526 is an apocalyptic number.

66020526 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 66020526, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84530628).

66020526 is an abundant number, since it is smaller than the sum of its proper divisors (103040730).

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

66020526 is a wasteful number, since it uses less digits than its factorization.

66020526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018 (or 2002 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 66020526 is about 8125.3015944025. The cubic root of 66020526 is about 404.1658919082.

The spelling of 66020526 in words is "sixty-six million, twenty thousand, five hundred twenty-six".