61660066146 has 32 divisors (see below), whose sum is σ = 140976457728. Its totient is φ = 17612266320.

The previous prime is 61660066099. The next prime is 61660066163. The reversal of 61660066146 is 64166006616.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 61660066098 and 61660066107.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49660 + ... + 354663.

It is an arithmetic number, because the mean of its divisors is an integer number (4405514304).

Almost surely, 2^61660066146 is an apocalyptic number.

61660066146 is an abundant number, since it is smaller than the sum of its proper divisors (79316391582).

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

61660066146 is a wasteful number, since it uses less digits than its factorization.

61660066146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407966.

The product of its (nonzero) digits is 186624, while the sum is 42.

The spelling of 61660066146 in words is "sixty-one billion, six hundred sixty million, sixty-six thousand, one hundred forty-six".