61880071 has 4 divisors (see below), whose sum is σ = 67505544. Its totient is φ = 56254600.

The previous prime is 61880057. The next prime is 61880081. The reversal of 61880071 is 17008816.

61880071 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 is a cyclic number.

It is not a de Polignac number, because 61880071 - 2⁷ = 61879943 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61880011) 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, 2812720 + ... + 2812741.

It is an arithmetic number, because the mean of its divisors is an integer number (16876386).

Almost surely, 2^61880071 is an apocalyptic number.

61880071 is a deficient number, since it is larger than the sum of its proper divisors (5625473).

61880071 is a wasteful number, since it uses less digits than its factorization.

61880071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5625472.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 61880071 is about 7866.3886885915. The cubic root of 61880071 is about 395.5337994803.

Adding to 61880071 its reverse (17008816), we get a palindrome (78888887).

The spelling of 61880071 in words is "sixty-one million, eight hundred eighty thousand, seventy-one".