7621660 has 48 divisors (see below), whose sum is σ = 17418240. Its totient is φ = 2790720.

The previous prime is 7621643. The next prime is 7621673. The reversal of 7621660 is 661267.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11457 + ... + 12103.

It is an arithmetic number, because the mean of its divisors is an integer number (362880).

Almost surely, 2^7621660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7621660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8709120).

7621660 is an abundant number, since it is smaller than the sum of its proper divisors (9796580).

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

7621660 is a wasteful number, since it uses less digits than its factorization.

7621660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706 (or 704 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 7621660 is about 2760.7354092705. The cubic root of 7621660 is about 196.7961163774.

It can be divided in two parts, 7621 and 660, that added together give a square (8281 = 91²).

The spelling of 7621660 in words is "seven million, six hundred twenty-one thousand, six hundred sixty".