6660290 has 48 divisors (see below), whose sum is σ = 14862528. Its totient is φ = 2104128.

The previous prime is 6660287. The next prime is 6660293. The reversal of 6660290 is 920666.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6660287) and next prime (6660293).

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660293) 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, 11549 + ... + 12111.

It is an arithmetic number, because the mean of its divisors is an integer number (309636).

Almost surely, 2^6660290 is an apocalyptic number.

6660290 is an abundant number, since it is smaller than the sum of its proper divisors (8202238).

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

6660290 is a wasteful number, since it uses less digits than its factorization.

6660290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603 (or 590 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 6660290 is about 2580.7537658599. The cubic root of 6660290 is about 188.1471799031.

The spelling of 6660290 in words is "six million, six hundred sixty thousand, two hundred ninety".