7666620 has 48 divisors (see below), whose sum is σ = 23120160. Its totient is φ = 1886976.

The previous prime is 7666619. The next prime is 7666621. The reversal of 7666620 is 266667.

It is an interprime number because it is at equal distance from previous prime (7666619) and next prime (7666621).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4135 + ... + 5694.

It is an arithmetic number, because the mean of its divisors is an integer number (481670).

Almost surely, 2^7666620 is an apocalyptic number.

It is an amenable number.

7666620 is an abundant number, since it is smaller than the sum of its proper divisors (15453540).

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

7666620 is a wasteful number, since it uses less digits than its factorization.

7666620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9854 (or 9852 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 7666620 is about 2768.8661939502. The cubic root of 7666620 is about 197.1823232417.

The spelling of 7666620 in words is "seven million, six hundred sixty-six thousand, six hundred twenty".