61660116 has 120 divisors (see below), whose sum is σ = 190378496. Its totient is φ = 17029440.

The previous prime is 61660103. The next prime is 61660127. The reversal of 61660116 is 61106616.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 61660116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 69870 + ... + 70746.

Almost surely, 2^61660116 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 61660116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95189248).

61660116 is an abundant number, since it is smaller than the sum of its proper divisors (128718380).

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

61660116 is a wasteful number, since it uses less digits than its factorization.

61660116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931 (or 920 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 61660116 is about 7852.3955580447. The cubic root of 61660116 is about 395.0645966032.

It can be divided in two parts, 61660 and 116, that added together give a triangular number (61776 = T₃₅₁).

The spelling of 61660116 in words is "sixty-one million, six hundred sixty thousand, one hundred sixteen".