66705301 has 4 divisors (see below), whose sum is σ = 71836492. Its totient is φ = 61574112.

The previous prime is 66705277. The next prime is 66705347. The reversal of 66705301 is 10350766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10350766 = 2 ⋅5175383.

It can be written as a sum of positive squares in 2 ways, for example, as 14432401 + 52272900 = 3799^2 + 7230^2 .

It is a cyclic number.

It is not a de Polignac number, because 66705301 - 2⁹ = 66704789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66705301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66705601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2565576 + ... + 2565601.

It is an arithmetic number, because the mean of its divisors is an integer number (17959123).

Almost surely, 2^66705301 is an apocalyptic number.

It is an amenable number.

66705301 is a deficient number, since it is larger than the sum of its proper divisors (5131191).

66705301 is a wasteful number, since it uses less digits than its factorization.

66705301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5131190.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 66705301 is about 8167.3313266942. The cubic root of 66705301 is about 405.5584451856.

The spelling of 66705301 in words is "sixty-six million, seven hundred five thousand, three hundred one".