61013766 has 48 divisors (see below), whose sum is σ = 138507264. Its totient is φ = 17886000.

The previous prime is 61013747. The next prime is 61013791. The reversal of 61013766 is 66731016.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21151 + ... + 23861.

It is an arithmetic number, because the mean of its divisors is an integer number (2885568).

Almost surely, 2^61013766 is an apocalyptic number.

61013766 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 61013766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69253632).

61013766 is an abundant number, since it is smaller than the sum of its proper divisors (77493498).

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

61013766 is a wasteful number, since it uses less digits than its factorization.

61013766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2769 (or 2758 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 61013766 is about 7811.1309040369. The cubic root of 61013766 is about 393.6793280066.

The spelling of 61013766 in words is "sixty-one million, thirteen thousand, seven hundred sixty-six".