67620505 has 4 divisors (see below), whose sum is σ = 81144612. Its totient is φ = 54096400.

The previous prime is 67620499. The next prime is 67620523. The reversal of 67620505 is 50502676.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46936201 + 20684304 = 6851^2 + 4548^2 .

It is not a de Polignac number, because 67620505 - 2¹¹ = 67618457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 6762046 + ... + 6762055.

It is an arithmetic number, because the mean of its divisors is an integer number (20286153).

Almost surely, 2^67620505 is an apocalyptic number.

It is an amenable number.

67620505 is a deficient number, since it is larger than the sum of its proper divisors (13524107).

67620505 is a wasteful number, since it uses less digits than its factorization.

67620505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13524106.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 67620505 is about 8223.1687931113. The cubic root of 67620505 is about 407.4047954036.

The spelling of 67620505 in words is "sixty-seven million, six hundred twenty thousand, five hundred five".