61167861 has 6 divisors (see below), whose sum is σ = 88353590. Its totient is φ = 40778568.

The previous prime is 61167839. The next prime is 61167863. The reversal of 61167861 is 16876116.

It can be written as a sum of positive squares in only one way, i.e., 61074225 + 93636 = 7815^2 + 306^2 .

It is not a de Polignac number, because 61167861 - 2⁶ = 61167797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61167863) 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, 3398206 + ... + 3398223.

Almost surely, 2^61167861 is an apocalyptic number.

It is an amenable number.

61167861 is a deficient number, since it is larger than the sum of its proper divisors (27185729).

61167861 is a wasteful number, since it uses less digits than its factorization.

61167861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6796435 (or 6796432 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 61167861 is about 7820.9884925117. The cubic root of 61167861 is about 394.0104719489.

The spelling of 61167861 in words is "sixty-one million, one hundred sixty-seven thousand, eight hundred sixty-one".