266090670 has 80 divisors (see below), whose sum is σ = 738638208. Its totient is φ = 68662080.

The previous prime is 266090663. The next prime is 266090677. The reversal of 266090670 is 76090662.

It is an interprime number because it is at equal distance from previous prime (266090663) and next prime (266090677).

It is a super-2 number, since 2×266090670² = 141608489322097800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266090677) 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 39 ways as a sum of consecutive naturals, for example, 19812 + ... + 30408.

Almost surely, 2^266090670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266090670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369319104).

266090670 is an abundant number, since it is smaller than the sum of its proper divisors (472547538).

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

266090670 is a wasteful number, since it uses less digits than its factorization.

266090670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10647 (or 10638 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 266090670 is about 16312.2858606634. The cubic root of 266090670 is about 643.1958234441.

The spelling of 266090670 in words is "two hundred sixty-six million, ninety thousand, six hundred seventy".