1263052220066 has 64 divisors (see below), whose sum is σ = 2345609145600. Its totient is φ = 496709404416.

The previous prime is 1263052220057. The next prime is 1263052220113. The reversal of 1263052220066 is 6600222503621.

It is a super-2 number, since 2×1263052220066² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146368640 + ... + 146377268.

It is an arithmetic number, because the mean of its divisors is an integer number (36650142900).

Almost surely, 2^{1263052220066} is an apocalyptic number.

1263052220066 is a deficient number, since it is larger than the sum of its proper divisors (1082556925534).

1263052220066 is a wasteful number, since it uses less digits than its factorization.

1263052220066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13323.

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 1263052220066 its reverse (6600222503621), we get a palindrome (7863274723687).

The spelling of 1263052220066 in words is "one trillion, two hundred sixty-three billion, fifty-two million, two hundred twenty thousand, sixty-six".