72681266 has 32 divisors (see below), whose sum is σ = 128472960. Its totient is φ = 30191616.

The previous prime is 72681263. The next prime is 72681269. The reversal of 72681266 is 66218627.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72681263) and next prime (72681269).

It is not an unprimeable number, because it can be changed into a prime (72681263) 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 15 ways as a sum of consecutive naturals, for example, 94130 + ... + 94898.

It is an arithmetic number, because the mean of its divisors is an integer number (4014780).

Almost surely, 2^72681266 is an apocalyptic number.

72681266 is a deficient number, since it is larger than the sum of its proper divisors (55791694).

72681266 is a wasteful number, since it uses less digits than its factorization.

72681266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978.

The product of its digits is 48384, while the sum is 38.

The square root of 72681266 is about 8525.3308440201. The cubic root of 72681266 is about 417.3247685152.

The spelling of 72681266 in words is "seventy-two million, six hundred eighty-one thousand, two hundred sixty-six".