7901660 has 24 divisors (see below), whose sum is σ = 17870496. Its totient is φ = 2917440.

The previous prime is 7901603. The next prime is 7901669. The reversal of 7901660 is 661097.

It is a happy number.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7901669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14936 + ... + 15455.

It is an arithmetic number, because the mean of its divisors is an integer number (744604).

Almost surely, 2^7901660 is an apocalyptic number.

It is an amenable number.

7901660 is an abundant number, since it is smaller than the sum of its proper divisors (9968836).

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

7901660 is a wasteful number, since it uses less digits than its factorization.

7901660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30413 (or 30411 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 7901660 is about 2810.9891497478. The cubic root of 7901660 is about 199.1771189774.

The spelling of 7901660 in words is "seven million, nine hundred one thousand, six hundred sixty".