67878542 has 4 divisors (see below), whose sum is σ = 101817816. Its totient is φ = 33939270.

The previous prime is 67878541. The next prime is 67878557. The reversal of 67878542 is 24587876.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67878541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16969634 + ... + 16969637.

It is an arithmetic number, because the mean of its divisors is an integer number (25454454).

Almost surely, 2^67878542 is an apocalyptic number.

67878542 is a deficient number, since it is larger than the sum of its proper divisors (33939274).

67878542 is a wasteful number, since it uses less digits than its factorization.

67878542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33939273.

The product of its digits is 752640, while the sum is 47.

The square root of 67878542 is about 8238.8434868008. The cubic root of 67878542 is about 407.9223508196.

The spelling of 67878542 in words is "sixty-seven million, eight hundred seventy-eight thousand, five hundred forty-two".