71654865 has 16 divisors (see below), whose sum is σ = 114887808. Its totient is φ = 38135936.

The previous prime is 71654861. The next prime is 71654873. The reversal of 71654865 is 56845617.

It is a cyclic number.

It is not a de Polignac number, because 71654865 - 2² = 71654861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71654861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2797 + ... + 12293.

It is an arithmetic number, because the mean of its divisors is an integer number (7180488).

Almost surely, 2^71654865 is an apocalyptic number.

It is an amenable number.

71654865 is a deficient number, since it is larger than the sum of its proper divisors (43232943).

71654865 is a wasteful number, since it uses less digits than its factorization.

71654865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10008.

The product of its digits is 201600, while the sum is 42.

The square root of 71654865 is about 8464.9196688451. The cubic root of 71654865 is about 415.3509684021.

The spelling of 71654865 in words is "seventy-one million, six hundred fifty-four thousand, eight hundred sixty-five".