61660255 has 8 divisors (see below), whose sum is σ = 74142432. Its totient is φ = 49228128.

The previous prime is 61660243. The next prime is 61660279. The reversal of 61660255 is 55206616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61660255 - 2⁷ = 61660127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9744 + ... + 14773.

It is an arithmetic number, because the mean of its divisors is an integer number (9267804).

Almost surely, 2^61660255 is an apocalyptic number.

61660255 is a deficient number, since it is larger than the sum of its proper divisors (12482177).

61660255 is a wasteful number, since it uses less digits than its factorization.

61660255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25025.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 61660255 is about 7852.4044088419. The cubic root of 61660255 is about 395.0648934669.

The spelling of 61660255 in words is "sixty-one million, six hundred sixty thousand, two hundred fifty-five".