72660073 has 4 divisors (see below), whose sum is σ = 74206080. Its totient is φ = 71114068.

The previous prime is 72660043. The next prime is 72660113. The reversal of 72660073 is 37006627.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72660073 - 2¹⁷ = 72529001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72660043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 772933 + ... + 773026.

It is an arithmetic number, because the mean of its divisors is an integer number (18551520).

Almost surely, 2^72660073 is an apocalyptic number.

It is an amenable number.

72660073 is a deficient number, since it is larger than the sum of its proper divisors (1546007).

72660073 is a wasteful number, since it uses less digits than its factorization.

72660073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546006.

The product of its (nonzero) digits is 10584, while the sum is 31.

The square root of 72660073 is about 8524.0878104346. The cubic root of 72660073 is about 417.2842022452.

The spelling of 72660073 in words is "seventy-two million, six hundred sixty thousand, seventy-three".