61689606 has 32 divisors (see below), whose sum is σ = 137731968. Its totient is φ = 18258240.

The previous prime is 61689587. The next prime is 61689629. The reversal of 61689606 is 60698616.

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, 8031 + ... + 13706.

It is an arithmetic number, because the mean of its divisors is an integer number (4304124).

Almost surely, 2^61689606 is an apocalyptic number.

61689606 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

61689606 is an abundant number, since it is smaller than the sum of its proper divisors (76042362).

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

61689606 is a wasteful number, since it uses less digits than its factorization.

61689606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21796.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 61689606 is about 7854.2731044954. The cubic root of 61689606 is about 395.1275686877.

The spelling of 61689606 in words is "sixty-one million, six hundred eighty-nine thousand, six hundred six".