63166856121 has 6 divisors (see below), whose sum is σ = 91241014410. Its totient is φ = 42111237408.

The previous prime is 63166856113. The next prime is 63166856143. The reversal of 63166856121 is 12165866136.

63166856121 is a `hidden beast` number, since 6 + 3 + 1 + 6 + 68 + 561 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 33612088896 + 29554767225 = 183336^2 + 171915^2 .

It is not a de Polignac number, because 63166856121 - 2³ = 63166856113 is a prime.

It is a super-2 number, since 2×63166856121² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63166846121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3509269776 + ... + 3509269793.

It is an arithmetic number, because the mean of its divisors is an integer number (15206835735).

Almost surely, 2^63166856121 is an apocalyptic number.

It is an amenable number.

63166856121 is a deficient number, since it is larger than the sum of its proper divisors (28074158289).

63166856121 is a wasteful number, since it uses less digits than its factorization.

63166856121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7018539575 (or 7018539572 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The spelling of 63166856121 in words is "sixty-three billion, one hundred sixty-six million, eight hundred fifty-six thousand, one hundred twenty-one".