7663220 has 18 divisors (see below), whose sum is σ = 16118802. Its totient is φ = 3060336.

The previous prime is 7663211. The next prime is 7663223. The reversal of 7663220 is 223667.

It can be written as a sum of positive squares in only one way, i.e., 6130576 + 1532644 = 2476^2 + 1238^2 .

It is a d-powerful number, because it can be written as 7⁸ + 6⁵ + 6⁷ + 3¹³ + 2¹³ + 2¹³ + 0 .

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 7663220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7663223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12071 + ... + 12689.

It is an arithmetic number, because the mean of its divisors is an integer number (895489).

Almost surely, 2^7663220 is an apocalyptic number.

It is an amenable number.

7663220 is an abundant number, since it is smaller than the sum of its proper divisors (8455582).

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

7663220 is an equidigital number, since it uses as much as digits as its factorization.

7663220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247 (or 626 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 7663220 is about 2768.2521561447. The cubic root of 7663220 is about 197.1531700629.

Adding to 7663220 its reverse (223667), we get a palindrome (7886887).

The spelling of 7663220 in words is "seven million, six hundred sixty-three thousand, two hundred twenty".