61119665 has 4 divisors (see below), whose sum is σ = 73343604. Its totient is φ = 48895728.

The previous prime is 61119661. The next prime is 61119677. The reversal of 61119665 is 56691116.

61119665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43546801 + 17572864 = 6599^2 + 4192^2 .

It is a cyclic number.

It is not a de Polignac number, because 61119665 - 2² = 61119661 is a prime.

It is a super-2 number, since 2×61119665² = 7471226899424450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61119661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6111962 + ... + 6111971.

It is an arithmetic number, because the mean of its divisors is an integer number (18335901).

Almost surely, 2^61119665 is an apocalyptic number.

It is an amenable number.

61119665 is a deficient number, since it is larger than the sum of its proper divisors (12223939).

61119665 is a wasteful number, since it uses less digits than its factorization.

61119665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12223938.

The product of its digits is 9720, while the sum is 35.

The square root of 61119665 is about 7817.9066891336. The cubic root of 61119665 is about 393.9069605182.

The spelling of 61119665 in words is "sixty-one million, one hundred nineteen thousand, six hundred sixty-five".