21662650167 has 16 divisors (see below), whose sum is σ = 29040721920. Its totient is φ = 14363296992.

The previous prime is 21662650151. The next prime is 21662650237. The reversal of 21662650167 is 76105626612.

It is not a de Polignac number, because 21662650167 - 2⁴ = 21662650151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21662650117) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 712309 + ... + 742097.

It is an arithmetic number, because the mean of its divisors is an integer number (1815045120).

Almost surely, 2^21662650167 is an apocalyptic number.

21662650167 is a deficient number, since it is larger than the sum of its proper divisors (7378071753).

21662650167 is a wasteful number, since it uses less digits than its factorization.

21662650167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31102.

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 21662650167 in words is "twenty-one billion, six hundred sixty-two million, six hundred fifty thousand, one hundred sixty-seven".