6601966 has 48 divisors (see below), whose sum is σ = 12558240. Its totient is φ = 2587200.

The previous prime is 6601961. The next prime is 6601993. The reversal of 6601966 is 6691066.

6601966 = 204² + 205² + ... + 304².

It is a happy number.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6601961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65316 + ... + 65416.

It is an arithmetic number, because the mean of its divisors is an integer number (261630).

Almost surely, 2^6601966 is an apocalyptic number.

6601966 is a deficient number, since it is larger than the sum of its proper divisors (5956274).

6601966 is a wasteful number, since it uses less digits than its factorization.

6601966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 6601966 is about 2569.4291194738. The cubic root of 6601966 is about 187.5963688315.

The spelling of 6601966 in words is "six million, six hundred one thousand, nine hundred sixty-six".