6652981 has 4 divisors (see below), whose sum is σ = 6660652. Its totient is φ = 6645312.

The previous prime is 6652979. The next prime is 6652993. The reversal of 6652981 is 1892566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2692881 + 3960100 = 1641^2 + 1990^2 .

It is a cyclic number.

It is not a de Polignac number, because 6652981 - 2¹ = 6652979 is a prime.

It is a super-2 number, since 2×6652981² = 88524312372722, which contains 22 as substring.

It is a Duffinian number.

6652981 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6652981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6652901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2340 + ... + 4333.

It is an arithmetic number, because the mean of its divisors is an integer number (1665163).

Almost surely, 2^6652981 is an apocalyptic number.

It is an amenable number.

6652981 is a deficient number, since it is larger than the sum of its proper divisors (7671).

6652981 is an equidigital number, since it uses as much as digits as its factorization.

6652981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7670.

The product of its digits is 25920, while the sum is 37.

The square root of 6652981 is about 2579.3373179947. The cubic root of 6652981 is about 188.0783304946.

The spelling of 6652981 in words is "six million, six hundred fifty-two thousand, nine hundred eighty-one".