266204040406 has 4 divisors (see below), whose sum is σ = 399306060612. Its totient is φ = 133102020202.

The previous prime is 266204040397. The next prime is 266204040439. The reversal of 266204040406 is 604040402662.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×266204040406² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66551010100 + ... + 66551010103.

It is an arithmetic number, because the mean of its divisors is an integer number (99826515153).

Almost surely, 2^266204040406 is an apocalyptic number.

266204040406 is a deficient number, since it is larger than the sum of its proper divisors (133102020206).

266204040406 is a wasteful number, since it uses less digits than its factorization.

266204040406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133102020205.

The product of its (nonzero) digits is 55296, while the sum is 34.

The spelling of 266204040406 in words is "two hundred sixty-six billion, two hundred four million, forty thousand, four hundred six".