7661181 has 16 divisors (see below), whose sum is σ = 11404800. Its totient is φ = 4534320.

The previous prime is 7661119. The next prime is 7661189. The reversal of 7661181 is 1811667.

It is a happy number.

It is not a de Polignac number, because 7661181 - 2⁷ = 7661053 is a prime.

It is a super-2 number, since 2×7661181² = 117387388629522, which contains 22 as substring.

7661181 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7661189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1281 + ... + 4118.

It is an arithmetic number, because the mean of its divisors is an integer number (712800).

Almost surely, 2^7661181 is an apocalyptic number.

It is an amenable number.

7661181 is a deficient number, since it is larger than the sum of its proper divisors (3743619).

7661181 is a wasteful number, since it uses less digits than its factorization.

7661181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5456.

The product of its digits is 2016, while the sum is 30.

The square root of 7661181 is about 2767.8838487191. The cubic root of 7661181 is about 197.1356825936.

The spelling of 7661181 in words is "seven million, six hundred sixty-one thousand, one hundred eighty-one".