67630905 has 12 divisors (see below), whose sum is σ = 117226980. Its totient is φ = 36069792.

The previous prime is 67630891. The next prime is 67630907. The reversal of 67630905 is 50903676.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 44475561 + 23155344 = 6669^2 + 4812^2 .

It is not a de Polignac number, because 67630905 - 2⁶ = 67630841 is a prime.

It is a super-2 number, since 2×67630905² = 9147878622238050, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 67630905.

It is not an unprimeable number, because it can be changed into a prime (67630907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 751410 + ... + 751499.

It is an arithmetic number, because the mean of its divisors is an integer number (9768915).

Almost surely, 2^67630905 is an apocalyptic number.

It is an amenable number.

67630905 is a deficient number, since it is larger than the sum of its proper divisors (49596075).

67630905 is a wasteful number, since it uses less digits than its factorization.

67630905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502920 (or 1502917 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The square root of 67630905 is about 8223.8011284320. The cubic root of 67630905 is about 407.4256805512.

The spelling of 67630905 in words is "sixty-seven million, six hundred thirty thousand, nine hundred five".