68661737 has 2 divisors, whose sum is σ = 68661738. Its totient is φ = 68661736.

The previous prime is 68661731. The next prime is 68661787. The reversal of 68661737 is 73716686.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64577296 + 4084441 = 8036^2 + 2021^2 .

It is a cyclic number.

It is not a de Polignac number, because 68661737 - 2²² = 64467433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68661731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34330868 + 34330869.

It is an arithmetic number, because the mean of its divisors is an integer number (34330869).

Almost surely, 2^68661737 is an apocalyptic number.

It is an amenable number.

68661737 is a deficient number, since it is larger than the sum of its proper divisors (1).

68661737 is an equidigital number, since it uses as much as digits as its factorization.

68661737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 44.

The square root of 68661737 is about 8286.2378073526. The cubic root of 68661737 is about 409.4852493068.

The spelling of 68661737 in words is "sixty-eight million, six hundred sixty-one thousand, seven hundred thirty-seven".