67721253 has 8 divisors (see below), whose sum is σ = 90333600. Its totient is φ = 45128208.

The previous prime is 67721233. The next prime is 67721273. The reversal of 67721253 is 35212776.

It is an interprime number because it is at equal distance from previous prime (67721233) and next prime (67721273).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 67721253 - 2⁶ = 67721189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67721233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9138 + ... + 14796.

It is an arithmetic number, because the mean of its divisors is an integer number (11291700).

Almost surely, 2^67721253 is an apocalyptic number.

It is an amenable number.

67721253 is a deficient number, since it is larger than the sum of its proper divisors (22612347).

67721253 is a wasteful number, since it uses less digits than its factorization.

67721253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9651.

The product of its digits is 17640, while the sum is 33.

The square root of 67721253 is about 8229.2923754111. The cubic root of 67721253 is about 407.6070262246.

The spelling of 67721253 in words is "sixty-seven million, seven hundred twenty-one thousand, two hundred fifty-three".