66668265 has 48 divisors (see below), whose sum is σ = 123160128. Its totient is φ = 34572096.

The previous prime is 66668243. The next prime is 66668281. The reversal of 66668265 is 56286666.

It is not a de Polignac number, because 66668265 - 2⁶ = 66668201 is a prime.

It is a super-2 number, since 2×66668265² = 8889315116220450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 66668265.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44214 + ... + 45696.

It is an arithmetic number, because the mean of its divisors is an integer number (2565836).

Almost surely, 2^66668265 is an apocalyptic number.

It is an amenable number.

66668265 is a deficient number, since it is larger than the sum of its proper divisors (56491863).

66668265 is a wasteful number, since it uses less digits than its factorization.

66668265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540 (or 1528 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 66668265 is about 8165.0636862183. The cubic root of 66668265 is about 405.4833734744.

The spelling of 66668265 in words is "sixty-six million, six hundred sixty-eight thousand, two hundred sixty-five".