68661872 has 20 divisors (see below), whose sum is σ = 133219896. Its totient is φ = 34282560.

The previous prime is 68661863. The next prime is 68661881. The reversal of 68661872 is 27816686.

It is an interprime number because it is at equal distance from previous prime (68661863) and next prime (68661881).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10523 + ... + 15749.

Almost surely, 2^68661872 is an apocalyptic number.

It is an amenable number.

68661872 is a deficient number, since it is larger than the sum of its proper divisors (64558024).

68661872 is a wasteful number, since it uses less digits than its factorization.

68661872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6056 (or 6050 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The square root of 68661872 is about 8286.2459533856. The cubic root of 68661872 is about 409.4855176779.

The spelling of 68661872 in words is "sixty-eight million, six hundred sixty-one thousand, eight hundred seventy-two".