66070273 has 4 divisors (see below), whose sum is σ = 66122820. Its totient is φ = 66017728.

The previous prime is 66070247. The next prime is 66070321. The reversal of 66070273 is 37207066.

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 27531009 + 38539264 = 5247^2 + 6208^2 .

It is a cyclic number.

It is not a de Polignac number, because 66070273 - 2⁹ = 66069761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66071273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24340 + ... + 26917.

It is an arithmetic number, because the mean of its divisors is an integer number (16530705).

Almost surely, 2^66070273 is an apocalyptic number.

It is an amenable number.

66070273 is a deficient number, since it is larger than the sum of its proper divisors (52547).

66070273 is a wasteful number, since it uses less digits than its factorization.

66070273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52546.

The product of its (nonzero) digits is 10584, while the sum is 31.

The square root of 66070273 is about 8128.3622581674. The cubic root of 66070273 is about 404.2673805104.

The spelling of 66070273 in words is "sixty-six million, seventy thousand, two hundred seventy-three".