61660323534 has 16 divisors (see below), whose sum is σ = 129811207680. Its totient is φ = 19471681080.

The previous prime is 61660323533. The next prime is 61660323541. The reversal of 61660323534 is 43532306616.

It is a junction number, because it is equal to n+sod(n) for n = 61660323492 and 61660323501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61660323533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270439902 + ... + 270440129.

It is an arithmetic number, because the mean of its divisors is an integer number (8113200480).

Almost surely, 2^61660323534 is an apocalyptic number.

61660323534 is an abundant number, since it is smaller than the sum of its proper divisors (68150884146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61660323534 is a wasteful number, since it uses less digits than its factorization.

61660323534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540880055.

The product of its (nonzero) digits is 233280, while the sum is 39.

The spelling of 61660323534 in words is "sixty-one billion, six hundred sixty million, three hundred twenty-three thousand, five hundred thirty-four".