67220072 has 8 divisors (see below), whose sum is σ = 126037650. Its totient is φ = 33610032.

The previous prime is 67220071. The next prime is 67220077. The reversal of 67220072 is 27002276.

It can be written as a sum of positive squares in only one way, i.e., 64866916 + 2353156 = 8054^2 + 1534^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (67220071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4201247 + ... + 4201262.

Almost surely, 2^67220072 is an apocalyptic number.

It is an amenable number.

67220072 is a deficient number, since it is larger than the sum of its proper divisors (58817578).

67220072 is a wasteful number, since it uses less digits than its factorization.

67220072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8402515 (or 8402511 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 67220072 is about 8198.7847880036. The cubic root of 67220072 is about 406.5990170847.

The spelling of 67220072 in words is "sixty-seven million, two hundred twenty thousand, seventy-two".