61865705 has 8 divisors (see below), whose sum is σ = 80987904. Its totient is φ = 44993200.

The previous prime is 61865659. The next prime is 61865707. The reversal of 61865705 is 50756816.

It is a happy number.

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

It is not a de Polignac number, because 61865705 - 2⁶ = 61865641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61865707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 562361 + ... + 562470.

It is an arithmetic number, because the mean of its divisors is an integer number (10123488).

Almost surely, 2^61865705 is an apocalyptic number.

It is an amenable number.

61865705 is a deficient number, since it is larger than the sum of its proper divisors (19122199).

61865705 is a wasteful number, since it uses less digits than its factorization.

61865705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124847.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 61865705 is about 7865.4755101011. The cubic root of 61865705 is about 395.5031882337.

Subtracting from 61865705 its reverse (50756816), we obtain a square (11108889 = 3333²).

The spelling of 61865705 in words is "sixty-one million, eight hundred sixty-five thousand, seven hundred five".