6161665 has 8 divisors (see below), whose sum is σ = 7519680. Its totient is φ = 4845552.

The previous prime is 6161663. The next prime is 6161693. The reversal of 6161665 is 5661616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6161665 - 2¹ = 6161663 is a prime.

It is a super-2 number, since 2×6161665² = 75932231144450, which contains 22 as substring.

6161665 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6161663) 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, 10149 + ... + 10738.

It is an arithmetic number, because the mean of its divisors is an integer number (939960).

Almost surely, 2^6161665 is an apocalyptic number.

It is an amenable number.

6161665 is a deficient number, since it is larger than the sum of its proper divisors (1358015).

6161665 is a wasteful number, since it uses less digits than its factorization.

6161665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20951.

The product of its digits is 6480, while the sum is 31.

The square root of 6161665 is about 2482.2701303444. The cubic root of 6161665 is about 183.3296436356.

The spelling of 6161665 in words is "six million, one hundred sixty-one thousand, six hundred sixty-five".