266691930 has 32 divisors (see below), whose sum is σ = 657362304. Its totient is φ = 69195456.

The previous prime is 266691911. The next prime is 266691949. The reversal of 266691930 is 39196662.

266691930 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (266691911) and next prime (266691949).

It is a super-2 number, since 2×266691930² = 142249171054249800, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 119022 + ... + 121241.

It is an arithmetic number, because the mean of its divisors is an integer number (20542572).

Almost surely, 2^266691930 is an apocalyptic number.

266691930 is an abundant number, since it is smaller than the sum of its proper divisors (390670374).

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

266691930 is a wasteful number, since it uses less digits than its factorization.

266691930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240310.

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 266691930 is about 16330.7051286832. The cubic root of 266691930 is about 643.6799153287.

The spelling of 266691930 in words is "two hundred sixty-six million, six hundred ninety-one thousand, nine hundred thirty".