266209420496 has 10 divisors (see below), whose sum is σ = 515780752242. Its totient is φ = 133104710240.

The previous prime is 266209420471. The next prime is 266209420523. The reversal of 266209420496 is 694024902662.

It can be written as a sum of positive squares in only one way, i.e., 246575806096 + 19633614400 = 496564^2 + 140120^2 .

It is a super-2 number, since 2×266209420496² (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, 8319044375 + ... + 8319044406.

Almost surely, 2^266209420496 is an apocalyptic number.

It is an amenable number.

266209420496 is a deficient number, since it is larger than the sum of its proper divisors (249571331746).

266209420496 is a wasteful number, since it uses less digits than its factorization.

266209420496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16638088789 (or 16638088783 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 50.

The spelling of 266209420496 in words is "two hundred sixty-six billion, two hundred nine million, four hundred twenty thousand, four hundred ninety-six".