1266655250002 has 4 divisors (see below), whose sum is σ = 1899982875006. Its totient is φ = 633327625000.

The previous prime is 1266655249999. The next prime is 1266655250057. The reversal of 1266655250002 is 2000525566621.

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

It can be written as a sum of positive squares in only one way, i.e., 808148858841 + 458506391161 = 898971^2 + 677131^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316663812499 + ... + 316663812502.

Almost surely, 2^{1266655250002} is an apocalyptic number.

1266655250002 is a deficient number, since it is larger than the sum of its proper divisors (633327625004).

1266655250002 is an equidigital number, since it uses as much as digits as its factorization.

1266655250002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633327625003.

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 1266655250002 in words is "one trillion, two hundred sixty-six billion, six hundred fifty-five million, two hundred fifty thousand, two".