66072796 has 6 divisors (see below), whose sum is σ = 115627400. Its totient is φ = 33036396.

The previous prime is 66072791. The next prime is 66072827. The reversal of 66072796 is 69727066.

It is a happy number.

66072796 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66072796² = 8731228742515232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66072791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8259096 + ... + 8259103.

Almost surely, 2^66072796 is an apocalyptic number.

It is an amenable number.

66072796 is a deficient number, since it is larger than the sum of its proper divisors (49554604).

66072796 is a wasteful number, since it uses less digits than its factorization.

66072796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16518203 (or 16518201 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 66072796 is about 8128.5174540011. The cubic root of 66072796 is about 404.2725263124.

The spelling of 66072796 in words is "sixty-six million, seventy-two thousand, seven hundred ninety-six".