7665220 has 12 divisors (see below), whose sum is σ = 16097004. Its totient is φ = 3066080.

The previous prime is 7665197. The next prime is 7665239. The reversal of 7665220 is 225667.

It can be written as a sum of positive squares in 2 ways, for example, as 6031936 + 1633284 = 2456^2 + 1278^2 .

It is a nialpdrome in base 10.

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, 191611 + ... + 191650.

It is an arithmetic number, because the mean of its divisors is an integer number (1341417).

Almost surely, 2^7665220 is an apocalyptic number.

It is an amenable number.

7665220 is an abundant number, since it is smaller than the sum of its proper divisors (8431784).

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

7665220 is a wasteful number, since it uses less digits than its factorization.

7665220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383270 (or 383268 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 7665220 is about 2768.6133713467. The cubic root of 7665220 is about 197.1703200357.

The spelling of 7665220 in words is "seven million, six hundred sixty-five thousand, two hundred twenty".