66413026 has 4 divisors (see below), whose sum is σ = 99619542. Its totient is φ = 33206512.

The previous prime is 66412993. The next prime is 66413057. The reversal of 66413026 is 62031466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 46172025 + 20241001 = 6795^2 + 4499^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66412985 and 66413003.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16603255 + ... + 16603258.

Almost surely, 2^66413026 is an apocalyptic number.

66413026 is a deficient number, since it is larger than the sum of its proper divisors (33206516).

66413026 is a wasteful number, since it uses less digits than its factorization.

66413026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33206515.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 66413026 is about 8149.4187522792. The cubic root of 66413026 is about 404.9652482502.

The spelling of 66413026 in words is "sixty-six million, four hundred thirteen thousand, twenty-six".