61560665 has 8 divisors (see below), whose sum is σ = 77760960. Its totient is φ = 46656432.

The previous prime is 61560599. The next prime is 61560701. The reversal of 61560665 is 56606516.

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 61560665 - 2¹² = 61556569 is a prime.

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, 323909 + ... + 324098.

It is an arithmetic number, because the mean of its divisors is an integer number (9720120).

Almost surely, 2^61560665 is an apocalyptic number.

It is an amenable number.

61560665 is a deficient number, since it is larger than the sum of its proper divisors (16200295).

61560665 is a wasteful number, since it uses less digits than its factorization.

61560665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648031.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 61560665 is about 7846.0604764429. The cubic root of 61560665 is about 394.8520836967.

The spelling of 61560665 in words is "sixty-one million, five hundred sixty thousand, six hundred sixty-five".