67621066 has 4 divisors (see below), whose sum is σ = 101431602. Its totient is φ = 33810532.

The previous prime is 67621063. The next prime is 67621079. The reversal of 67621066 is 66012676.

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

It can be written as a sum of positive squares in only one way, i.e., 56565441 + 11055625 = 7521^2 + 3325^2 .

It is not an unprimeable number, because it can be changed into a prime (67621061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16905265 + ... + 16905268.

Almost surely, 2^67621066 is an apocalyptic number.

67621066 is a deficient number, since it is larger than the sum of its proper divisors (33810536).

67621066 is a wasteful number, since it uses less digits than its factorization.

67621066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33810535.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 67621066 is about 8223.2029039785. The cubic root of 67621066 is about 407.4059220513.

The spelling of 67621066 in words is "sixty-seven million, six hundred twenty-one thousand, sixty-six".