67642553 has 4 divisors (see below), whose sum is σ = 73791888. Its totient is φ = 61493220.

The previous prime is 67642501. The next prime is 67642559. The reversal of 67642553 is 35524676.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67642553 - 2¹⁰ = 67641529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67642559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3074651 + ... + 3074672.

It is an arithmetic number, because the mean of its divisors is an integer number (18447972).

Almost surely, 2^67642553 is an apocalyptic number.

It is an amenable number.

67642553 is a deficient number, since it is larger than the sum of its proper divisors (6149335).

67642553 is a wasteful number, since it uses less digits than its factorization.

67642553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6149334.

The product of its digits is 151200, while the sum is 38.

The square root of 67642553 is about 8224.5092862736. The cubic root of 67642553 is about 407.4490693747.

The spelling of 67642553 in words is "sixty-seven million, six hundred forty-two thousand, five hundred fifty-three".