66410626 has 4 divisors (see below), whose sum is σ = 99615942. Its totient is φ = 33205312.

The previous prime is 66410593. The next prime is 66410627. The reversal of 66410626 is 62601466.

66410626 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 55487601 + 10923025 = 7449^2 + 3305^2 .

It is not an unprimeable number, because it can be changed into a prime (66410627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16602655 + ... + 16602658.

Almost surely, 2^66410626 is an apocalyptic number.

66410626 is a deficient number, since it is larger than the sum of its proper divisors (33205316).

66410626 is a wasteful number, since it uses less digits than its factorization.

66410626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33205315.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 66410626 is about 8149.2715011834. The cubic root of 66410626 is about 404.9603700490.

The spelling of 66410626 in words is "sixty-six million, four hundred ten thousand, six hundred twenty-six".