66698248 has 8 divisors (see below), whose sum is σ = 125059230. Its totient is φ = 33349120.

The previous prime is 66698243. The next prime is 66698273. The reversal of 66698248 is 84289666.

It can be written as a sum of positive squares in only one way, i.e., 49871844 + 16826404 = 7062^2 + 4102^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (66698243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4168633 + ... + 4168648.

Almost surely, 2^66698248 is an apocalyptic number.

It is an amenable number.

66698248 is a deficient number, since it is larger than the sum of its proper divisors (58360982).

66698248 is a wasteful number, since it uses less digits than its factorization.

66698248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8337287 (or 8337283 counting only the distinct ones).

The product of its digits is 995328, while the sum is 49.

The square root of 66698248 is about 8166.8995340949. The cubic root of 66698248 is about 405.5441509466.

The spelling of 66698248 in words is "sixty-six million, six hundred ninety-eight thousand, two hundred forty-eight".