61660301659 has 16 divisors (see below), whose sum is σ = 69686424576. Its totient is φ = 54050680800.

The previous prime is 61660301657. The next prime is 61660301693. The reversal of 61660301659 is 95610306616.

It is a cyclic number.

It is not a de Polignac number, because 61660301659 - 2¹ = 61660301657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61660301653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231937 + ... + 420850.

It is an arithmetic number, because the mean of its divisors is an integer number (4355401536).

Almost surely, 2^61660301659 is an apocalyptic number.

61660301659 is a deficient number, since it is larger than the sum of its proper divisors (8026122917).

61660301659 is a wasteful number, since it uses less digits than its factorization.

61660301659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653106.

The product of its (nonzero) digits is 174960, while the sum is 43.

The spelling of 61660301659 in words is "sixty-one billion, six hundred sixty million, three hundred one thousand, six hundred fifty-nine".