16065977 has 4 divisors (see below), whose sum is σ = 16117620. Its totient is φ = 16014336.

The previous prime is 16065923. The next prime is 16065979. The reversal of 16065977 is 77956061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77956061 = 199 ⋅391739.

It can be written as a sum of positive squares in 2 ways, for example, as 5851561 + 10214416 = 2419^2 + 3196^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16065977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16065979) 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, 25352 + ... + 25977.

It is an arithmetic number, because the mean of its divisors is an integer number (4029405).

Almost surely, 2^16065977 is an apocalyptic number.

It is an amenable number.

16065977 is a deficient number, since it is larger than the sum of its proper divisors (51643).

16065977 is an equidigital number, since it uses as much as digits as its factorization.

16065977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51642.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 16065977 is about 4008.2386406001. The cubic root of 16065977 is about 252.3300925372.

The spelling of 16065977 in words is "sixteen million, sixty-five thousand, nine hundred seventy-seven".