68661011 has 8 divisors (see below), whose sum is σ = 74665440. Its totient is φ = 62875008.

The previous prime is 68660993. The next prime is 68661017. The reversal of 68661011 is 11016686.

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 68661011 - 2²⁶ = 1552147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68661017) 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, 53951 + ... + 55208.

It is an arithmetic number, because the mean of its divisors is an integer number (9333180).

Almost surely, 2^68661011 is an apocalyptic number.

68661011 is a deficient number, since it is larger than the sum of its proper divisors (6004429).

68661011 is a wasteful number, since it uses less digits than its factorization.

68661011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109213.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 68661011 is about 8286.1939996599. The cubic root of 68661011 is about 409.4838060608.

Adding to 68661011 its reverse (11016686), we get a palindrome (79677697).

The spelling of 68661011 in words is "sixty-eight million, six hundred sixty-one thousand, eleven".