66630458 has 16 divisors (see below), whose sum is σ = 104815080. Its totient is φ = 31723776.

The previous prime is 66630427. The next prime is 66630467. The reversal of 66630458 is 85403666.

It can be written as a sum of positive squares in 4 ways, for example, as 65885689 + 744769 = 8117^2 + 863^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3635 + ... + 12102.

Almost surely, 2^66630458 is an apocalyptic number.

66630458 is a deficient number, since it is larger than the sum of its proper divisors (38184622).

66630458 is a wasteful number, since it uses less digits than its factorization.

66630458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15841.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 66630458 is about 8162.7481891824. The cubic root of 66630458 is about 405.4067102690.

The spelling of 66630458 in words is "sixty-six million, six hundred thirty thousand, four hundred fifty-eight".