61998806 has 16 divisors (see below), whose sum is σ = 96123888. Its totient is φ = 29971200.

The previous prime is 61998799. The next prime is 61998841. The reversal of 61998806 is 60889916.

61998806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5921 + ... + 12611.

It is an arithmetic number, because the mean of its divisors is an integer number (6007743).

Almost surely, 2^61998806 is an apocalyptic number.

61998806 is a deficient number, since it is larger than the sum of its proper divisors (34125082).

61998806 is a wasteful number, since it uses less digits than its factorization.

61998806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6847.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 61998806 is about 7873.9320545710. The cubic root of 61998806 is about 395.7866202407.

The spelling of 61998806 in words is "sixty-one million, nine hundred ninety-eight thousand, eight hundred six".