63015666 has 96 divisors (see below), whose sum is σ = 160056000. Its totient is φ = 16426368.

The previous prime is 63015643. The next prime is 63015677. The reversal of 63015666 is 66651036.

63015666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×63015666² = 7941948322847112, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 161800 + ... + 162188.

It is an arithmetic number, because the mean of its divisors is an integer number (1667250).

Almost surely, 2^63015666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63015666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80028000).

63015666 is an abundant number, since it is smaller than the sum of its proper divisors (97040334).

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

63015666 is a wasteful number, since it uses less digits than its factorization.

63015666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 63015666 is about 7938.2407370903. The cubic root of 63015666 is about 397.9387000193.

The spelling of 63015666 in words is "sixty-three million, fifteen thousand, six hundred sixty-six".