68571761 has 4 divisors (see below), whose sum is σ = 72605412. Its totient is φ = 64538112.

The previous prime is 68571751. The next prime is 68571773. The reversal of 68571761 is 16717586.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43970161 + 24601600 = 6631^2 + 4960^2 .

It is a cyclic number.

It is not a de Polignac number, because 68571761 - 2²⁶ = 1462897 is a prime.

It is a super-2 number, since 2×68571761² = 9404172813282242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68571751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2016800 + ... + 2016833.

It is an arithmetic number, because the mean of its divisors is an integer number (18151353).

Almost surely, 2^68571761 is an apocalyptic number.

It is an amenable number.

68571761 is a deficient number, since it is larger than the sum of its proper divisors (4033651).

68571761 is a wasteful number, since it uses less digits than its factorization.

68571761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4033650.

The product of its digits is 70560, while the sum is 41.

The square root of 68571761 is about 8280.8067843659. The cubic root of 68571761 is about 409.3063046630.

The spelling of 68571761 in words is "sixty-eight million, five hundred seventy-one thousand, seven hundred sixty-one".