7665161 has 4 divisors (see below), whose sum is σ = 8760192. Its totient is φ = 6570132.

The previous prime is 7665149. The next prime is 7665167. The reversal of 7665161 is 1615667.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1615667 = 479 ⋅3373.

It is a cyclic number.

It is not a de Polignac number, because 7665161 - 2¹⁴ = 7648777 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7665167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547505 + ... + 547518.

It is an arithmetic number, because the mean of its divisors is an integer number (2190048).

Almost surely, 2^7665161 is an apocalyptic number.

It is an amenable number.

7665161 is a deficient number, since it is larger than the sum of its proper divisors (1095031).

7665161 is a wasteful number, since it uses less digits than its factorization.

7665161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095030.

The product of its digits is 7560, while the sum is 32.

The square root of 7665161 is about 2768.6027161729. The cubic root of 7665161 is about 197.1698141542.

The spelling of 7665161 in words is "seven million, six hundred sixty-five thousand, one hundred sixty-one".