61166032664 has 64 divisors (see below), whose sum is σ = 128318618880. Its totient is φ = 27097200000.

The previous prime is 61166032651. The next prime is 61166032673. The reversal of 61166032664 is 46623066116.

It is a congruent number.

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, 660839 + ... + 747689.

It is an arithmetic number, because the mean of its divisors is an integer number (2004978420).

Almost surely, 2^61166032664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61166032664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64159309440).

61166032664 is an abundant number, since it is smaller than the sum of its proper divisors (67152586216).

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

61166032664 is a wasteful number, since it uses less digits than its factorization.

61166032664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87072 (or 87068 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 41.

The spelling of 61166032664 in words is "sixty-one billion, one hundred sixty-six million, thirty-two thousand, six hundred sixty-four".