20166720167 has 8 divisors (see below), whose sum is σ = 22594654992. Its totient is φ = 17837884800.

The previous prime is 20166720163. The next prime is 20166720173. The reversal of 20166720167 is 76102766102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20166720167 - 2² = 20166720163 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20166720167.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20166720163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24774434 + ... + 24775247.

It is an arithmetic number, because the mean of its divisors is an integer number (2824331874).

Almost surely, 2^20166720167 is an apocalyptic number.

20166720167 is a deficient number, since it is larger than the sum of its proper divisors (2427934825).

20166720167 is a wasteful number, since it uses less digits than its factorization.

20166720167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49549729.

The product of its (nonzero) digits is 42336, while the sum is 38.

The spelling of 20166720167 in words is "twenty billion, one hundred sixty-six million, seven hundred twenty thousand, one hundred sixty-seven".