66202542 has 64 divisors (see below), whose sum is σ = 172085760. Its totient is φ = 18470592.

The previous prime is 66202537. The next prime is 66202559. The reversal of 66202542 is 24520266.

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 31 ways as a sum of consecutive naturals, for example, 14218 + ... + 18290.

It is an arithmetic number, because the mean of its divisors is an integer number (2688840).

Almost surely, 2^66202542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66202542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86042880).

66202542 is an abundant number, since it is smaller than the sum of its proper divisors (105883218).

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

66202542 is a wasteful number, since it uses less digits than its factorization.

66202542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4134 (or 4128 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 66202542 is about 8136.4944540017. The cubic root of 66202542 is about 404.5369742661.

The spelling of 66202542 in words is "sixty-six million, two hundred two thousand, five hundred forty-two".