72070065 has 36 divisors (see below), whose sum is σ = 126974172. Its totient is φ = 37814400.

The previous prime is 72070057. The next prime is 72070067. The reversal of 72070065 is 56007027.

It can be written as a sum of positive squares in 6 ways, for example, as 11370384 + 60699681 = 3372^2 + 7791^2 .

It is not a de Polignac number, because 72070065 - 2³ = 72070057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72070067) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 458967 + ... + 459123.

Almost surely, 2^72070065 is an apocalyptic number.

It is an amenable number.

72070065 is a deficient number, since it is larger than the sum of its proper divisors (54904107).

72070065 is a wasteful number, since it uses less digits than its factorization.

72070065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 72070065 is about 8489.4089900299. The cubic root of 72070065 is about 416.1516662991.

The spelling of 72070065 in words is "seventy-two million, seventy thousand, sixty-five".