61659565 has 8 divisors (see below), whose sum is σ = 80718048. Its totient is φ = 44843280.

The previous prime is 61659509. The next prime is 61659571. The reversal of 61659565 is 56595616.

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

It is not a de Polignac number, because 61659565 - 2¹⁵ = 61626797 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 7 ways as a sum of consecutive naturals, for example, 560487 + ... + 560596.

It is an arithmetic number, because the mean of its divisors is an integer number (10089756).

Almost surely, 2^61659565 is an apocalyptic number.

It is an amenable number.

61659565 is a deficient number, since it is larger than the sum of its proper divisors (19058483).

61659565 is a wasteful number, since it uses less digits than its factorization.

61659565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121099.

The product of its digits is 243000, while the sum is 43.

The square root of 61659565 is about 7852.3604731316. The cubic root of 61659565 is about 395.0634198229.

The spelling of 61659565 in words is "sixty-one million, six hundred fifty-nine thousand, five hundred sixty-five".