66655156 has 12 divisors (see below), whose sum is σ = 117046692. Its totient is φ = 33213248.

The previous prime is 66655133. The next prime is 66655157. The reversal of 66655156 is 65155666.

It can be written as a sum of positive squares in 2 ways, for example, as 33246756 + 33408400 = 5766^2 + 5780^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66655157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27265 + ... + 29608.

It is an arithmetic number, because the mean of its divisors is an integer number (9753891).

Almost surely, 2^66655156 is an apocalyptic number.

It is an amenable number.

66655156 is a deficient number, since it is larger than the sum of its proper divisors (50391536).

66655156 is a wasteful number, since it uses less digits than its factorization.

66655156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57170 (or 57168 counting only the distinct ones).

The product of its digits is 162000, while the sum is 40.

The square root of 66655156 is about 8164.2608973501. The cubic root of 66655156 is about 405.4567949617.

The spelling of 66655156 in words is "sixty-six million, six hundred fifty-five thousand, one hundred fifty-six".