61678926 has 36 divisors (see below), whose sum is σ = 137401992. Its totient is φ = 19995984.

The previous prime is 61678913. The next prime is 61678931. The reversal of 61678926 is 62987616.

61678926 is a `hidden beast` number, since 616 + 7 + 8 + 9 + 26 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23391 + ... + 25893.

It is an arithmetic number, because the mean of its divisors is an integer number (3816722).

Almost surely, 2^61678926 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61678926, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68700996).

61678926 is an abundant number, since it is smaller than the sum of its proper divisors (75723066).

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

61678926 is a wasteful number, since it uses less digits than its factorization.

61678926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2585 (or 2545 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 61678926 is about 7853.5931903811. The cubic root of 61678926 is about 395.1047652461.

The spelling of 61678926 in words is "sixty-one million, six hundred seventy-eight thousand, nine hundred twenty-six".