61686265 has 4 divisors (see below), whose sum is σ = 74023524. Its totient is φ = 49349008.

The previous prime is 61686259. The next prime is 61686301. The reversal of 61686265 is 56268616.

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 42928704 + 18757561 = 6552^2 + 4331^2 .

It is a cyclic number.

It is not a de Polignac number, because 61686265 - 2¹³ = 61678073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6168622 + ... + 6168631.

It is an arithmetic number, because the mean of its divisors is an integer number (18505881).

Almost surely, 2^61686265 is an apocalyptic number.

It is an amenable number.

61686265 is a deficient number, since it is larger than the sum of its proper divisors (12337259).

61686265 is a wasteful number, since it uses less digits than its factorization.

61686265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12337258.

The product of its digits is 103680, while the sum is 40.

The square root of 61686265 is about 7854.0604148428. The cubic root of 61686265 is about 395.1204354221.

The spelling of 61686265 in words is "sixty-one million, six hundred eighty-six thousand, two hundred sixty-five".