66275012 has 6 divisors (see below), whose sum is σ = 115981278. Its totient is φ = 33137504.

The previous prime is 66274991. The next prime is 66275017. The reversal of 66275012 is 21057266.

It can be written as a sum of positive squares in only one way, i.e., 49758916 + 16516096 = 7054^2 + 4064^2 .

It is not an unprimeable number, because it can be changed into a prime (66275017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8284373 + ... + 8284380.

It is an arithmetic number, because the mean of its divisors is an integer number (19330213).

Almost surely, 2^66275012 is an apocalyptic number.

It is an amenable number.

66275012 is a deficient number, since it is larger than the sum of its proper divisors (49706266).

66275012 is a wasteful number, since it uses less digits than its factorization.

66275012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16568757 (or 16568755 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 66275012 is about 8140.9466280034. The cubic root of 66275012 is about 404.6845320623.

The spelling of 66275012 in words is "sixty-six million, two hundred seventy-five thousand, twelve".