68769661 has 4 divisors (see below), whose sum is σ = 68796000. Its totient is φ = 68743324.

The previous prime is 68769619. The next prime is 68769667. The reversal of 68769661 is 16696786.

It is the 3386-th star number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68769661 - 2¹⁵ = 68736893 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68769667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8761 + ... + 14638.

It is an arithmetic number, because the mean of its divisors is an integer number (17199000).

Almost surely, 2^68769661 is an apocalyptic number.

It is an amenable number.

68769661 is a deficient number, since it is larger than the sum of its proper divisors (26339).

68769661 is a wasteful number, since it uses less digits than its factorization.

68769661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26338.

The product of its digits is 653184, while the sum is 49.

The square root of 68769661 is about 8292.7474940456. The cubic root of 68769661 is about 409.6996829129.

The spelling of 68769661 in words is "sixty-eight million, seven hundred sixty-nine thousand, six hundred sixty-one".