6416661988 has 24 divisors (see below), whose sum is σ = 12894729120. Its totient is φ = 2763155520.

The previous prime is 6416661959. The next prime is 6416662001. The reversal of 6416661988 is 8891666146.

It is a super-2 number, since 2×6416661988² = 82347102136488224288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3836881 + ... + 3838552.

It is an arithmetic number, because the mean of its divisors is an integer number (537280380).

Almost surely, 2^6416661988 is an apocalyptic number.

It is an amenable number.

6416661988 is an abundant number, since it is smaller than the sum of its proper divisors (6478067132).

6416661988 is a wasteful number, since it uses less digits than its factorization.

6416661988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7675467 (or 7675465 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 55.

The square root of 6416661988 is about 80104.0697343150. The cubic root of 6416661988 is about 1858.2453475999.

The spelling of 6416661988 in words is "six billion, four hundred sixteen million, six hundred sixty-one thousand, nine hundred eighty-eight".