16700081 has 2 divisors, whose sum is σ = 16700082. Its totient is φ = 16700080.

The previous prime is 16700071. The next prime is 16700149. The reversal of 16700081 is 18000761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16679056 + 21025 = 4084^2 + 145^2 .

It is a cyclic number.

It is not a de Polignac number, because 16700081 - 2¹⁰ = 16699057 is a prime.

It is a super-2 number, since 2×16700081² = 557785410813122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16700051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8350040 + 8350041.

It is an arithmetic number, because the mean of its divisors is an integer number (8350041).

Almost surely, 2^16700081 is an apocalyptic number.

It is an amenable number.

16700081 is a deficient number, since it is larger than the sum of its proper divisors (1).

16700081 is an equidigital number, since it uses as much as digits as its factorization.

16700081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 16700081 is about 4086.5732588564. The cubic root of 16700081 is about 255.6070683037.

The spelling of 16700081 in words is "sixteen million, seven hundred thousand, eighty-one".