66265020 has 144 divisors (see below), whose sum is σ = 214203360. Its totient is φ = 17003520.

The previous prime is 66265019. The next prime is 66265033. The reversal of 66265020 is 2056266.

66265020 is a `hidden beast` number, since 6 + 6 + 2 + 650 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 907704 + ... + 907776.

Almost surely, 2^66265020 is an apocalyptic number.

66265020 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 66265020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107101680).

66265020 is an abundant number, since it is smaller than the sum of its proper divisors (147938340).

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

66265020 is a wasteful number, since it uses less digits than its factorization.

66265020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 124 counting only the distinct ones).

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

The square root of 66265020 is about 8140.3329170250. The cubic root of 66265020 is about 404.6641935217.

The spelling of 66265020 in words is "sixty-six million, two hundred sixty-five thousand, twenty".