266009972 has 6 divisors (see below), whose sum is σ = 465517458. Its totient is φ = 133004984.

The previous prime is 266009971. The next prime is 266010001. The reversal of 266009972 is 279900662.

It is a happy number.

266009972 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 223681936 + 42328036 = 14956^2 + 6506^2 .

It is a super-2 number, since 2×266009972² = 141522610406881568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266009971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33251243 + ... + 33251250.

It is an arithmetic number, because the mean of its divisors is an integer number (77586243).

Almost surely, 2^266009972 is an apocalyptic number.

It is an amenable number.

266009972 is a deficient number, since it is larger than the sum of its proper divisors (199507486).

266009972 is a wasteful number, since it uses less digits than its factorization.

266009972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66502497 (or 66502495 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 266009972 is about 16309.8121387096. The cubic root of 266009972 is about 643.1307956543.

The spelling of 266009972 in words is "two hundred sixty-six million, nine thousand, nine hundred seventy-two".