66326905 has 4 divisors (see below), whose sum is σ = 79592292. Its totient is φ = 53061520.

The previous prime is 66326879. The next prime is 66326921. The reversal of 66326905 is 50962366.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16426809 + 49900096 = 4053^2 + 7064^2 .

It is not a de Polignac number, because 66326905 - 2²³ = 57938297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6632686 + ... + 6632695.

It is an arithmetic number, because the mean of its divisors is an integer number (19898073).

Almost surely, 2^66326905 is an apocalyptic number.

It is an amenable number.

66326905 is a deficient number, since it is larger than the sum of its proper divisors (13265387).

66326905 is a wasteful number, since it uses less digits than its factorization.

66326905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13265386.

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 66326905 is about 8144.1331644319. The cubic root of 66326905 is about 404.7901264894.

The spelling of 66326905 in words is "sixty-six million, three hundred twenty-six thousand, nine hundred five".