72866743 has 4 divisors (see below), whose sum is σ = 77153040. Its totient is φ = 68580448.

The previous prime is 72866723. The next prime is 72866747. The reversal of 72866743 is 34766827.

It is a happy number.

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

It is not a de Polignac number, because 72866743 - 2¹³ = 72858551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72866743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72866747) 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, 2143123 + ... + 2143156.

It is an arithmetic number, because the mean of its divisors is an integer number (19288260).

Almost surely, 2^72866743 is an apocalyptic number.

72866743 is a deficient number, since it is larger than the sum of its proper divisors (4286297).

72866743 is a wasteful number, since it uses less digits than its factorization.

72866743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4286296.

The product of its digits is 338688, while the sum is 43.

The square root of 72866743 is about 8536.2019071716. The cubic root of 72866743 is about 417.6794605397.

The spelling of 72866743 in words is "seventy-two million, eight hundred sixty-six thousand, seven hundred forty-three".