266670438 has 8 divisors (see below), whose sum is σ = 533340888. Its totient is φ = 88890144.

The previous prime is 266670431. The next prime is 266670461. The reversal of 266670438 is 834076662.

It is a sphenic number, since it is the product of 3 distinct primes.

266670438 is an admirable number.

It is a super-2 number, since 2×266670438² = 142226245006223688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 266670438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266670431) 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, 22222531 + ... + 22222542.

It is an arithmetic number, because the mean of its divisors is an integer number (66667611).

Almost surely, 2^266670438 is an apocalyptic number.

266670438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

266670438 is a wasteful number, since it uses less digits than its factorization.

266670438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44445078.

The product of its (nonzero) digits is 290304, while the sum is 42.

The square root of 266670438 is about 16330.0470911752. The cubic root of 266670438 is about 643.6626240414.

The spelling of 266670438 in words is "two hundred sixty-six million, six hundred seventy thousand, four hundred thirty-eight".