7660121 has 6 divisors (see below), whose sum is σ = 8910810. Its totient is φ = 6565776.

The previous prime is 7660099. The next prime is 7660129. The reversal of 7660121 is 1210667.

It can be written as a sum of positive squares in only one way, i.e., 6528025 + 1132096 = 2555^2 + 1064^2 .

It is not a de Polignac number, because 7660121 - 2⁶ = 7660057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7660129) 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, 78116 + ... + 78213.

It is an arithmetic number, because the mean of its divisors is an integer number (1485135).

Almost surely, 2^7660121 is an apocalyptic number.

It is an amenable number.

7660121 is a deficient number, since it is larger than the sum of its proper divisors (1250689).

7660121 is a wasteful number, since it uses less digits than its factorization.

7660121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156343 (or 156336 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 7660121 is about 2767.6923600718. The cubic root of 7660121 is about 197.1265902852.

Adding to 7660121 its reverse (1210667), we get a palindrome (8870788).

The spelling of 7660121 in words is "seven million, six hundred sixty thousand, one hundred twenty-one".