67678990 has 16 divisors (see below), whose sum is σ = 124656048. Its totient is φ = 26441856.

The previous prime is 67678981. The next prime is 67678991. The reversal of 67678990 is 9987676.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67678991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78267 + ... + 79126.

It is an arithmetic number, because the mean of its divisors is an integer number (7791003).

Almost surely, 2^67678990 is an apocalyptic number.

67678990 is a deficient number, since it is larger than the sum of its proper divisors (56977058).

67678990 is a wasteful number, since it uses less digits than its factorization.

67678990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157443.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The square root of 67678990 is about 8226.7241354016. The cubic root of 67678990 is about 407.5222164108.

The spelling of 67678990 in words is "sixty-seven million, six hundred seventy-eight thousand, nine hundred ninety".