66701045 has 4 divisors (see below), whose sum is σ = 80041260. Its totient is φ = 53360832.

The previous prime is 66701027. The next prime is 66701051. The reversal of 66701045 is 54010766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54010766 = 2 ⋅27005383.

It can be written as a sum of positive squares in 2 ways, for example, as 23746129 + 42954916 = 4873^2 + 6554^2 .

It is a cyclic number.

It is not a de Polignac number, because 66701045 - 2²⁰ = 65652469 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66700999 and 66701017.

It is a congruent 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, 6670100 + ... + 6670109.

It is an arithmetic number, because the mean of its divisors is an integer number (20010315).

Almost surely, 2^66701045 is an apocalyptic number.

It is an amenable number.

66701045 is a deficient number, since it is larger than the sum of its proper divisors (13340215).

66701045 is a wasteful number, since it uses less digits than its factorization.

66701045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13340214.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 66701045 is about 8167.0707723149. The cubic root of 66701045 is about 405.5498197169.

The spelling of 66701045 in words is "sixty-six million, seven hundred one thousand, forty-five".