72766219 has 4 divisors (see below), whose sum is σ = 76596040. Its totient is φ = 68936400.

The previous prime is 72766193. The next prime is 72766223. The reversal of 72766219 is 91266727.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72766219 - 2⁷ = 72766091 is a prime.

It is a super-2 number, since 2×72766219² = 10589845255111922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72766279) 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, 1914882 + ... + 1914919.

It is an arithmetic number, because the mean of its divisors is an integer number (19149010).

Almost surely, 2^72766219 is an apocalyptic number.

72766219 is a deficient number, since it is larger than the sum of its proper divisors (3829821).

72766219 is a wasteful number, since it uses less digits than its factorization.

72766219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3829820.

The product of its digits is 63504, while the sum is 40.

The square root of 72766219 is about 8530.3117762483. The cubic root of 72766219 is about 417.4873009392.

The spelling of 72766219 in words is "seventy-two million, seven hundred sixty-six thousand, two hundred nineteen".