66148388 has 12 divisors (see below), whose sum is σ = 116045580. Its totient is φ = 32992512.

The previous prime is 66148387. The next prime is 66148393. The reversal of 66148388 is 88384166.

It can be written as a sum of positive squares in 2 ways, for example, as 36096064 + 30052324 = 6008^2 + 5482^2 .

It is not an unprimeable number, because it can be changed into a prime (66148387) 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, 18581 + ... + 21852.

It is an arithmetic number, because the mean of its divisors is an integer number (9670465).

Almost surely, 2^66148388 is an apocalyptic number.

It is an amenable number.

66148388 is a deficient number, since it is larger than the sum of its proper divisors (49897192).

66148388 is a wasteful number, since it uses less digits than its factorization.

66148388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40846 (or 40844 counting only the distinct ones).

The product of its digits is 221184, while the sum is 44.

The square root of 66148388 is about 8133.1659272389. The cubic root of 66148388 is about 404.4266397745.

The spelling of 66148388 in words is "sixty-six million, one hundred forty-eight thousand, three hundred eighty-eight".