61686708 has 24 divisors (see below), whose sum is σ = 144074112. Its totient is φ = 20542464.

The previous prime is 61686707. The next prime is 61686731. The reversal of 61686708 is 80768616.

It is a self number, because there is not a number n which added to its sum of digits gives 61686708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61686707) 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, 16116 + ... + 19572.

It is an arithmetic number, because the mean of its divisors is an integer number (6003088).

Almost surely, 2^61686708 is an apocalyptic number.

It is an amenable number.

61686708 is an abundant number, since it is smaller than the sum of its proper divisors (82387404).

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

61686708 is a wasteful number, since it uses less digits than its factorization.

61686708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4951 (or 4949 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 61686708 is about 7854.0886167652. The cubic root of 61686708 is about 395.1213812725.

The spelling of 61686708 in words is "sixty-one million, six hundred eighty-six thousand, seven hundred eight".