68488665 has 96 divisors (see below), whose sum is σ = 138872064. Its totient is φ = 28200960.

The previous prime is 68488663. The next prime is 68488681. The reversal of 68488665 is 56688486.

68488665 = T₄₁₄ + T₄₁₅ + ... + T₇₈₃.

It is not a de Polignac number, because 68488665 - 2¹ = 68488663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (68488661) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1122735 + ... + 1122795.

It is an arithmetic number, because the mean of its divisors is an integer number (1446584).

Almost surely, 2^68488665 is an apocalyptic number.

It is an amenable number.

68488665 is an abundant number, since it is smaller than the sum of its proper divisors (70383399).

68488665 is a wasteful number, since it uses less digits than its factorization.

68488665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 130 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 51.

The square root of 68488665 is about 8275.7878779002. The cubic root of 68488665 is about 409.1409039011.

The spelling of 68488665 in words is "sixty-eight million, four hundred eighty-eight thousand, six hundred sixty-five".