67670978 has 8 divisors (see below), whose sum is σ = 105006780. Its totient is φ = 32668720.

The previous prime is 67670971. The next prime is 67671001. The reversal of 67670978 is 87907676.

It can be written as a sum of positive squares in 2 ways, for example, as 59336209 + 8334769 = 7703^2 + 2887^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×67670978² = 9158722526952968, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67670971) 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, 583313 + ... + 583428.

Almost surely, 2^67670978 is an apocalyptic number.

67670978 is a deficient number, since it is larger than the sum of its proper divisors (37335802).

67670978 is a wasteful number, since it uses less digits than its factorization.

67670978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166772.

The product of its (nonzero) digits is 889056, while the sum is 50.

The square root of 67670978 is about 8226.2371713925. The cubic root of 67670978 is about 407.5061346261.

The spelling of 67670978 in words is "sixty-seven million, six hundred seventy thousand, nine hundred seventy-eight".