266666672 has 40 divisors (see below), whose sum is σ = 545054400. Its totient is φ = 126038592.

The previous prime is 266666671. The next prime is 266666723. The reversal of 266666672 is 276666662.

It is a super-2 number, since 2×266666672² = 142222227911111168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266666671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224063 + ... + 225249.

It is an arithmetic number, because the mean of its divisors is an integer number (13626360).

Almost surely, 2^266666672 is an apocalyptic number.

It is an amenable number.

266666672 is an abundant number, since it is smaller than the sum of its proper divisors (278387728).

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

266666672 is a wasteful number, since it uses less digits than its factorization.

266666672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953 (or 1947 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 47.

The square root of 266666672 is about 16329.9317818538. The cubic root of 266666672 is about 643.6595940282.

The spelling of 266666672 in words is "two hundred sixty-six million, six hundred sixty-six thousand, six hundred seventy-two".