66670266 has 16 divisors (see below), whose sum is σ = 143597664. Its totient is φ = 20513904.

The previous prime is 66670213. The next prime is 66670267. The reversal of 66670266 is 66207666.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66670267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427296 + ... + 427451.

It is an arithmetic number, because the mean of its divisors is an integer number (8974854).

Almost surely, 2^66670266 is an apocalyptic number.

66670266 is an abundant number, since it is smaller than the sum of its proper divisors (76927398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66670266 is a wasteful number, since it uses less digits than its factorization.

66670266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854765.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 66670266 is about 8165.1862195543. The cubic root of 66670266 is about 405.4874301977.

The spelling of 66670266 in words is "sixty-six million, six hundred seventy thousand, two hundred sixty-six".