68907761 has 16 divisors (see below), whose sum is σ = 77145600. Its totient is φ = 61119360.

The previous prime is 68907743. The next prime is 68907767. The reversal of 68907761 is 16770986.

It is a cyclic number.

It is not a de Polignac number, because 68907761 - 2¹⁴ = 68891377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68907767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65165 + ... + 66213.

It is an arithmetic number, because the mean of its divisors is an integer number (4821600).

Almost surely, 2^68907761 is an apocalyptic number.

It is an amenable number.

68907761 is a deficient number, since it is larger than the sum of its proper divisors (8237839).

68907761 is a wasteful number, since it uses less digits than its factorization.

68907761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 68907761 is about 8301.0698708058. The cubic root of 68907761 is about 409.9737460881.

The spelling of 68907761 in words is "sixty-eight million, nine hundred seven thousand, seven hundred sixty-one".