6641662616 has 8 divisors (see below), whose sum is σ = 12453117420. Its totient is φ = 3320831304.

The previous prime is 6641662579. The next prime is 6641662639. The reversal of 6641662616 is 6162661466.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×6641662616² = 88223364609543926912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415103906 + ... + 415103921.

Almost surely, 2^6641662616 is an apocalyptic number.

It is an amenable number.

6641662616 is a deficient number, since it is larger than the sum of its proper divisors (5811454804).

6641662616 is a wasteful number, since it uses less digits than its factorization.

6641662616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830207833 (or 830207829 counting only the distinct ones).

The product of its digits is 373248, while the sum is 44.

The square root of 6641662616 is about 81496.3963375069. The cubic root of 6641662616 is about 1879.7161386720.

The spelling of 6641662616 in words is "six billion, six hundred forty-one million, six hundred sixty-two thousand, six hundred sixteen".