66137248 has 12 divisors (see below), whose sum is σ = 130207770. Its totient is φ = 33068608.

The previous prime is 66137221. The next prime is 66137257. The reversal of 66137248 is 84273166.

It can be written as a sum of positive squares in only one way, i.e., 49392784 + 16744464 = 7028^2 + 4092^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1033363 + ... + 1033426.

Almost surely, 2^66137248 is an apocalyptic number.

It is an amenable number.

66137248 is a deficient number, since it is larger than the sum of its proper divisors (64070522).

66137248 is a wasteful number, since it uses less digits than its factorization.

66137248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2066799 (or 2066791 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 66137248 is about 8132.4810482411. The cubic root of 66137248 is about 404.4039354384.

It can be divided in two parts, 6613 and 7248, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 66137248 in words is "sixty-six million, one hundred thirty-seven thousand, two hundred forty-eight".