63421535166 has 32 divisors (see below), whose sum is σ = 140719593600. Its totient is φ = 18892906080.

The previous prime is 63421535147. The next prime is 63421535179. The reversal of 63421535166 is 66153512436.

It is a super-2 number, since 2×63421535166² (a number of 22 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 in 15 ways as a sum of consecutive naturals, for example, 8139601 + ... + 8147388.

It is an arithmetic number, because the mean of its divisors is an integer number (4397487300).

Almost surely, 2^63421535166 is an apocalyptic number.

63421535166 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

63421535166 is an abundant number, since it is smaller than the sum of its proper divisors (77298058434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63421535166 is a wasteful number, since it uses less digits than its factorization.

63421535166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16287064.

The product of its digits is 388800, while the sum is 42.

The spelling of 63421535166 in words is "sixty-three billion, four hundred twenty-one million, five hundred thirty-five thousand, one hundred sixty-six".