1263610160066 has 4 divisors (see below), whose sum is σ = 1895415240102. Its totient is φ = 631805080032.

The previous prime is 1263610160051. The next prime is 1263610160069. The reversal of 1263610160066 is 6600610163621.

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., 868875658225 + 394734501841 = 932135^2 + 628279^2 .

It is a super-2 number, since 2×1263610160066² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1263610160069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315902540015 + ... + 315902540018.

Almost surely, 2^{1263610160066} is an apocalyptic number.

1263610160066 is a deficient number, since it is larger than the sum of its proper divisors (631805080036).

1263610160066 is an equidigital number, since it uses as much as digits as its factorization.

1263610160066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631805080035.

The product of its (nonzero) digits is 46656, while the sum is 38.

The spelling of 1263610160066 in words is "one trillion, two hundred sixty-three billion, six hundred ten million, one hundred sixty thousand, sixty-six".