61678170 has 48 divisors (see below), whose sum is σ = 161123040. Its totient is φ = 16369632.

The previous prime is 61678163. The next prime is 61678171. The reversal of 61678170 is 7187616.

It is a happy number.

61678170 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (61678171) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 18921 + ... + 21939.

It is an arithmetic number, because the mean of its divisors is an integer number (3356730).

Almost surely, 2^61678170 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61678170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80561520).

61678170 is an abundant number, since it is smaller than the sum of its proper divisors (99444870).

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

61678170 is a wasteful number, since it uses less digits than its factorization.

61678170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3259 (or 3256 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 61678170 is about 7853.5450593983. The cubic root of 61678170 is about 395.1031509702.

The spelling of 61678170 in words is "sixty-one million, six hundred seventy-eight thousand, one hundred seventy".