72766049 has 4 divisors (see below), whose sum is σ = 73186836. Its totient is φ = 72345264.

The previous prime is 72766039. The next prime is 72766063. The reversal of 72766049 is 94066727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94066727 = 67 ⋅1403981.

It can be written as a sum of positive squares in 2 ways, for example, as 37149025 + 35617024 = 6095^2 + 5968^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72766049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72765997 and 72766015.

It is not an unprimeable number, because it can be changed into a prime (72766009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210134 + ... + 210479.

It is an arithmetic number, because the mean of its divisors is an integer number (18296709).

Almost surely, 2^72766049 is an apocalyptic number.

It is an amenable number.

72766049 is a deficient number, since it is larger than the sum of its proper divisors (420787).

72766049 is a wasteful number, since it uses less digits than its factorization.

72766049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420786.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 72766049 is about 8530.3018117767. The cubic root of 72766049 is about 417.4869758209.

The spelling of 72766049 in words is "seventy-two million, seven hundred sixty-six thousand, forty-nine".