66130628 has 6 divisors (see below), whose sum is σ = 115728606. Its totient is φ = 33065312.

The previous prime is 66130609. The next prime is 66130637. The reversal of 66130628 is 82603166.

It can be written as a sum of positive squares in only one way, i.e., 38167684 + 27962944 = 6178^2 + 5288^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66130594 and 66130603.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8266325 + ... + 8266332.

It is an arithmetic number, because the mean of its divisors is an integer number (19288101).

Almost surely, 2^66130628 is an apocalyptic number.

It is an amenable number.

66130628 is a deficient number, since it is larger than the sum of its proper divisors (49597978).

66130628 is a wasteful number, since it uses less digits than its factorization.

66130628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16532661 (or 16532659 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 66130628 is about 8132.0740281923. The cubic root of 66130628 is about 404.3904420668.

The spelling of 66130628 in words is "sixty-six million, one hundred thirty thousand, six hundred twenty-eight".