16166720711 has 4 divisors (see below), whose sum is σ = 16167123024. Its totient is φ = 16166318400.

The previous prime is 16166720699. The next prime is 16166720729. The reversal of 16166720711 is 11702766161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16166720711 is a prime.

It is a super-2 number, since 2×16166720711² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16166720771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133235 + ... + 223796.

It is an arithmetic number, because the mean of its divisors is an integer number (4041780756).

Almost surely, 2^16166720711 is an apocalyptic number.

16166720711 is a deficient number, since it is larger than the sum of its proper divisors (402313).

16166720711 is an equidigital number, since it uses as much as digits as its factorization.

16166720711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402312.

The product of its (nonzero) digits is 21168, while the sum is 38.

The spelling of 16166720711 in words is "sixteen billion, one hundred sixty-six million, seven hundred twenty thousand, seven hundred eleven".