61775 has 12 divisors (see below), whose sum is σ = 87792. Its totient is φ = 42240.

The previous prime is 61757. The next prime is 61781. The reversal of 61775 is 57716.

61775 = 2⁵ + 3⁵ + ... + 8⁵.

61775 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 61775 - 2⁸ = 61519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2 + ... + 351.

It is an arithmetic number, because the mean of its divisors is an integer number (7316).

2⁶¹⁷⁷⁵ is an apocalyptic number.

61775 is a deficient number, since it is larger than the sum of its proper divisors (26017).

61775 is a wasteful number, since it uses less digits than its factorization.

61775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 365 counting only the distinct ones).

The product of its digits is 1470, while the sum is 26.

The square root of 61775 is about 248.5457704327. The cubic root of 61775 is about 39.5309803421.

The spelling of 61775 in words is "sixty-one thousand, seven hundred seventy-five".