67628761 has 4 divisors (see below), whose sum is σ = 67663312. Its totient is φ = 67594212.

The previous prime is 67628747. The next prime is 67628767. The reversal of 67628761 is 16782676.

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 67628761 - 2¹⁵ = 67595993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67628767) 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, 14151 + ... + 18316.

It is an arithmetic number, because the mean of its divisors is an integer number (16915828).

Almost surely, 2^67628761 is an apocalyptic number.

It is an amenable number.

67628761 is a deficient number, since it is larger than the sum of its proper divisors (34551).

67628761 is a wasteful number, since it uses less digits than its factorization.

67628761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34550.

The product of its digits is 169344, while the sum is 43.

The square root of 67628761 is about 8223.6707740522. The cubic root of 67628761 is about 407.4213751729.

The spelling of 67628761 in words is "sixty-seven million, six hundred twenty-eight thousand, seven hundred sixty-one".