72066945 has 8 divisors (see below), whose sum is σ = 115307136. Its totient is φ = 38435696.

The previous prime is 72066931. The next prime is 72066959. The reversal of 72066945 is 54966027.

It is an interprime number because it is at equal distance from previous prime (72066931) and next prime (72066959).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72066945 - 2¹⁰ = 72065921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2402217 + ... + 2402246.

It is an arithmetic number, because the mean of its divisors is an integer number (14413392).

Almost surely, 2^72066945 is an apocalyptic number.

It is an amenable number.

72066945 is a deficient number, since it is larger than the sum of its proper divisors (43240191).

72066945 is a wasteful number, since it uses less digits than its factorization.

72066945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4804471.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 72066945 is about 8489.2252296661. The cubic root of 72066945 is about 416.1456609767.

The spelling of 72066945 in words is "seventy-two million, sixty-six thousand, nine hundred forty-five".