266639936662 has 16 divisors (see below), whose sum is σ = 436678461072. Its totient is φ = 121100369920.

The previous prime is 266639936623. The next prime is 266639936671.

It is a happy number.

266639936662 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 266639936594 and 266639936603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4952683 + ... + 5006230.

It is an arithmetic number, because the mean of its divisors is an integer number (27292403817).

Almost surely, 2^266639936662 is an apocalyptic number.

266639936662 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

266639936662 is a deficient number, since it is larger than the sum of its proper divisors (170038524410).

266639936662 is a wasteful number, since it uses less digits than its factorization.

266639936662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9960143.

The product of its digits is 136048896, while the sum is 64.

The spelling of 266639936662 in words is "two hundred sixty-six billion, six hundred thirty-nine million, nine hundred thirty-six thousand, six hundred sixty-two".