266897970440 has 16 divisors (see below), whose sum is σ = 600520433580. Its totient is φ = 106759188160.

The previous prime is 266897970431. The next prime is 266897970467. The reversal of 266897970440 is 44079798662.

It can be written as a sum of positive squares in 2 ways, for example, as 259755354244 + 7142616196 = 509662^2 + 84514^2 .

It is a super-2 number, since 2×266897970440² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3336224591 + ... + 3336224670.

Almost surely, 2^266897970440 is an apocalyptic number.

266897970440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266897970440 is an abundant number, since it is smaller than the sum of its proper divisors (333622463140).

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

266897970440 is a wasteful number, since it uses less digits than its factorization.

266897970440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6672449272 (or 6672449268 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 62.

The spelling of 266897970440 in words is "two hundred sixty-six billion, eight hundred ninety-seven million, nine hundred seventy thousand, four hundred forty".