6657615672 has 16 divisors (see below), whose sum is σ = 16644039240. Its totient is φ = 2219205216.

The previous prime is 6657615647. The next prime is 6657615697. The reversal of 6657615672 is 2765167566.

It is an interprime number because it is at equal distance from previous prime (6657615647) and next prime (6657615697).

It is a super-3 number, since 3×6657615672³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138700303 + ... + 138700350.

Almost surely, 2^6657615672 is an apocalyptic number.

It is an amenable number.

6657615672 is an abundant number, since it is smaller than the sum of its proper divisors (9986423568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6657615672 is a wasteful number, since it uses less digits than its factorization.

6657615672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277400662 (or 277400658 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 51.

The square root of 6657615672 is about 81594.2134712995. The cubic root of 6657615672 is about 1881.2199408125.

The spelling of 6657615672 in words is "six billion, six hundred fifty-seven million, six hundred fifteen thousand, six hundred seventy-two".