66020052 has 36 divisors (see below), whose sum is σ = 179198880. Its totient is φ = 18862704.

The previous prime is 66020029. The next prime is 66020077. The reversal of 66020052 is 25002066.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55552 + ... + 56727.

Almost surely, 2^66020052 is an apocalyptic number.

It is an amenable number.

66020052 is an abundant number, since it is smaller than the sum of its proper divisors (113178828).

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

66020052 is a wasteful number, since it uses less digits than its factorization.

66020052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112300 (or 112291 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 66020052 is about 8125.2724262021. The cubic root of 66020052 is about 404.1649246580.

The spelling of 66020052 in words is "sixty-six million, twenty thousand, fifty-two".