6416165986 has 4 divisors (see below), whose sum is σ = 9624248982. Its totient is φ = 3208082992.

The previous prime is 6416165971. The next prime is 6416166079. The reversal of 6416165986 is 6895616146.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6895616146 = 2 ⋅3447808073.

It can be written as a sum of positive squares in only one way, i.e., 5993082225 + 423083761 = 77415^2 + 20569^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1604041495 + ... + 1604041498.

Almost surely, 2^6416165986 is an apocalyptic number.

6416165986 is a deficient number, since it is larger than the sum of its proper divisors (3208082996).

6416165986 is a wasteful number, since it uses less digits than its factorization.

6416165986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208082995.

The product of its digits is 1866240, while the sum is 52.

The square root of 6416165986 is about 80100.9736894627. The cubic root of 6416165986 is about 1858.1974661542.

The spelling of 6416165986 in words is "six billion, four hundred sixteen million, one hundred sixty-five thousand, nine hundred eighty-six".