72065871 has 6 divisors (see below), whose sum is σ = 104095160. Its totient is φ = 48043908.

The previous prime is 72065867. The next prime is 72065887. The reversal of 72065871 is 17856027.

72065871 is a `hidden beast` number, since 72 + 0 + 6 + 587 + 1 = 666.

It is not a de Polignac number, because 72065871 - 2² = 72065867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72065821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4003651 + ... + 4003668.

Almost surely, 2^72065871 is an apocalyptic number.

72065871 is a deficient number, since it is larger than the sum of its proper divisors (32029289).

72065871 is a wasteful number, since it uses less digits than its factorization.

72065871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8007325 (or 8007322 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 72065871 is about 8489.1619727745. The cubic root of 72065871 is about 416.1435937198.

The spelling of 72065871 in words is "seventy-two million, sixty-five thousand, eight hundred seventy-one".