66020156 has 6 divisors (see below), whose sum is σ = 115535280. Its totient is φ = 33010076.

The previous prime is 66020147. The next prime is 66020159. The reversal of 66020156 is 65102066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66020159) by changing a digit.

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 as a sum of consecutive naturals, namely, 8252516 + ... + 8252523.

It is an arithmetic number, because the mean of its divisors is an integer number (19255880).

Almost surely, 2^66020156 is an apocalyptic number.

It is an amenable number.

66020156 is a deficient number, since it is larger than the sum of its proper divisors (49515124).

66020156 is a wasteful number, since it uses less digits than its factorization.

66020156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16505043 (or 16505041 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 66020156 is about 8125.2788259850. The cubic root of 66020156 is about 404.1651368821.

The spelling of 66020156 in words is "sixty-six million, twenty thousand, one hundred fifty-six".