6661626 has 8 divisors (see below), whose sum is σ = 13323264. Its totient is φ = 2220540.

The previous prime is 6661601. The next prime is 6661643. The reversal of 6661626 is 6261666.

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

6661626 is an admirable number.

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is a Curzon 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, 555130 + ... + 555141.

It is an arithmetic number, because the mean of its divisors is an integer number (1665408).

Almost surely, 2^6661626 is an apocalyptic number.

6661626 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6661626 is a wasteful number, since it uses less digits than its factorization.

6661626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110276.

The product of its digits is 15552, while the sum is 33.

The square root of 6661626 is about 2581.0125919879. The cubic root of 6661626 is about 188.1597593267.

The spelling of 6661626 in words is "six million, six hundred sixty-one thousand, six hundred twenty-six".