266148690 has 16 divisors (see below), whose sum is σ = 638756928. Its totient is φ = 70972976.

The previous prime is 266148661. The next prime is 266148691. The reversal of 266148690 is 96841662.

It is a super-2 number, since 2×266148690² = 141670250377432200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266148691) 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, 4435782 + ... + 4435841.

It is an arithmetic number, because the mean of its divisors is an integer number (39922308).

Almost surely, 2^266148690 is an apocalyptic number.

266148690 is an abundant number, since it is smaller than the sum of its proper divisors (372608238).

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

266148690 is a wasteful number, since it uses less digits than its factorization.

266148690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8871633.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 266148690 is about 16314.0641778804. The cubic root of 266148690 is about 643.2425688006.

The spelling of 266148690 in words is "two hundred sixty-six million, one hundred forty-eight thousand, six hundred ninety".