66271136 has 12 divisors (see below), whose sum is σ = 130471362. Its totient is φ = 33135552.

The previous prime is 66271103. The next prime is 66271189. The reversal of 66271136 is 63117266.

It can be written as a sum of positive squares in only one way, i.e., 58675600 + 7595536 = 7660^2 + 2756^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 2070973 = 66271136 / (6 + 6 + 2 + 7 + 1 + 1 + 3 + 6).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1035455 + ... + 1035518.

Almost surely, 2^66271136 is an apocalyptic number.

It is an amenable number.

66271136 is a deficient number, since it is larger than the sum of its proper divisors (64200226).

66271136 is a wasteful number, since it uses less digits than its factorization.

66271136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070983 (or 2070975 counting only the distinct ones).

The product of its digits is 9072, while the sum is 32.

The square root of 66271136 is about 8140.7085686689. The cubic root of 66271136 is about 404.6766427751.

The spelling of 66271136 in words is "sixty-six million, two hundred seventy-one thousand, one hundred thirty-six".