61706381 has 8 divisors (see below), whose sum is σ = 67393728. Its totient is φ = 56032000.

The previous prime is 61706377. The next prime is 61706383. The reversal of 61706381 is 18360716.

61706381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61706381 - 2² = 61706377 is a prime.

It is a super-2 number, since 2×61706381² = 7615354912234322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61706383) 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 7 ways as a sum of consecutive naturals, for example, 8621 + ... + 14061.

It is an arithmetic number, because the mean of its divisors is an integer number (8424216).

Almost surely, 2^61706381 is an apocalyptic number.

It is an amenable number.

61706381 is a deficient number, since it is larger than the sum of its proper divisors (5687347).

61706381 is a wasteful number, since it uses less digits than its factorization.

61706381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6483.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 61706381 is about 7855.3409219460. The cubic root of 61706381 is about 395.1633805783.

The spelling of 61706381 in words is "sixty-one million, seven hundred six thousand, three hundred eighty-one".