266749668 has 36 divisors (see below), whose sum is σ = 696037888. Its totient is φ = 86047920.

The previous prime is 266749661. The next prime is 266749673. The reversal of 266749668 is 866947662.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×266749668² = 142310770756220448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266749661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118396 + ... + 120627.

Almost surely, 2^266749668 is an apocalyptic number.

It is an amenable number.

266749668 is an abundant number, since it is smaller than the sum of its proper divisors (429288220).

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

266749668 is a wasteful number, since it uses less digits than its factorization.

266749668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239064 (or 239059 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The square root of 266749668 is about 16332.4728072634. The cubic root of 266749668 is about 643.7263635649.

The spelling of 266749668 in words is "two hundred sixty-six million, seven hundred forty-nine thousand, six hundred sixty-eight".