66295945 has 4 divisors (see below), whose sum is σ = 79555140. Its totient is φ = 53036752.

The previous prime is 66295939. The next prime is 66295961. The reversal of 66295945 is 54959266.

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 29463184 + 36832761 = 5428^2 + 6069^2 .

It is a cyclic number.

It is not a de Polignac number, because 66295945 - 2¹⁷ = 66164873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66295895 and 66295904.

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, 6629590 + ... + 6629599.

It is an arithmetic number, because the mean of its divisors is an integer number (19888785).

Almost surely, 2^66295945 is an apocalyptic number.

It is an amenable number.

66295945 is a deficient number, since it is larger than the sum of its proper divisors (13259195).

66295945 is a wasteful number, since it uses less digits than its factorization.

66295945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13259194.

The product of its digits is 583200, while the sum is 46.

The square root of 66295945 is about 8142.2321877972. The cubic root of 66295945 is about 404.7271341901.

The spelling of 66295945 in words is "sixty-six million, two hundred ninety-five thousand, nine hundred forty-five".