71659965 has 32 divisors (see below), whose sum is σ = 124225920. Its totient is φ = 35064576.

The previous prime is 71659961. The next prime is 71659969. The reversal of 71659965 is 56995617.

It is an interprime number because it is at equal distance from previous prime (71659961) and next prime (71659969).

It is not a de Polignac number, because 71659965 - 2² = 71659961 is a prime.

It is a super-3 number, since 3×71659965³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71659961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33879 + ... + 35931.

It is an arithmetic number, because the mean of its divisors is an integer number (3882060).

Almost surely, 2^71659965 is an apocalyptic number.

It is an amenable number.

71659965 is a deficient number, since it is larger than the sum of its proper divisors (52565955).

71659965 is a wasteful number, since it uses less digits than its factorization.

71659965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253.

The product of its digits is 510300, while the sum is 48.

The square root of 71659965 is about 8465.2209067454. The cubic root of 71659965 is about 415.3608223024.

The spelling of 71659965 in words is "seventy-one million, six hundred fifty-nine thousand, nine hundred sixty-five".