63666622 has 16 divisors (see below), whose sum is σ = 102868992. Its totient is φ = 29466360.

The previous prime is 63666619. The next prime is 63666637. The reversal of 63666622 is 22666636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20898 + ... + 23749.

It is an arithmetic number, because the mean of its divisors is an integer number (6429312).

Almost surely, 2^63666622 is an apocalyptic number.

63666622 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

63666622 is a deficient number, since it is larger than the sum of its proper divisors (39202370).

63666622 is a wasteful number, since it uses less digits than its factorization.

63666622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44703.

The product of its digits is 93312, while the sum is 37.

The square root of 63666622 is about 7979.1366700916. The cubic root of 63666622 is about 399.3042530421.

The spelling of 63666622 in words is "sixty-three million, six hundred sixty-six thousand, six hundred twenty-two".