61681710 has 32 divisors (see below), whose sum is σ = 149509152. Its totient is φ = 16284800.

The previous prime is 61681709. The next prime is 61681721. The reversal of 61681710 is 1718616.

It is a happy number.

61681710 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 15 ways as a sum of consecutive naturals, for example, 7149 + ... + 13208.

It is an arithmetic number, because the mean of its divisors is an integer number (4672161).

Almost surely, 2^61681710 is an apocalyptic number.

61681710 is an abundant number, since it is smaller than the sum of its proper divisors (87827442).

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

61681710 is a wasteful number, since it uses less digits than its factorization.

61681710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20468.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 61681710 is about 7853.7704320918. The cubic root of 61681710 is about 395.1107097677.

The spelling of 61681710 in words is "sixty-one million, six hundred eighty-one thousand, seven hundred ten".