6655690 has 8 divisors (see below), whose sum is σ = 11980260. Its totient is φ = 2662272.

The previous prime is 6655673. The next prime is 6655723. The reversal of 6655690 is 965566.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6255001 + 400689 = 2501^2 + 633^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×6655690² = 88596418752200, which contains 22 as substring.

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, 332775 + ... + 332794.

Almost surely, 2^6655690 is an apocalyptic number.

6655690 is a deficient number, since it is larger than the sum of its proper divisors (5324570).

6655690 is a wasteful number, since it uses less digits than its factorization.

6655690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665576.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 6655690 is about 2579.8623994314. The cubic root of 6655690 is about 188.1038546448.

The spelling of 6655690 in words is "six million, six hundred fifty-five thousand, six hundred ninety".