68866757 has 8 divisors (see below), whose sum is σ = 71026200. Its totient is φ = 66730240.

The previous prime is 68866751. The next prime is 68866781. The reversal of 68866757 is 75766886.

It can be written as a sum of positive squares in 4 ways, for example, as 3806401 + 65060356 = 1951^2 + 8066^2 .

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 68866757 - 2¹⁰ = 68865733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68866699 and 68866708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68866751) 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, 473 + ... + 11745.

It is an arithmetic number, because the mean of its divisors is an integer number (8878275).

Almost surely, 2^68866757 is an apocalyptic number.

It is an amenable number.

68866757 is a deficient number, since it is larger than the sum of its proper divisors (2159443).

68866757 is a wasteful number, since it uses less digits than its factorization.

68866757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11463.

The product of its digits is 3386880, while the sum is 53.

The square root of 68866757 is about 8298.5997011544. The cubic root of 68866757 is about 409.8924107941.

The spelling of 68866757 in words is "sixty-eight million, eight hundred sixty-six thousand, seven hundred fifty-seven".