70785818 has 4 divisors (see below), whose sum is σ = 106178730. Its totient is φ = 35392908.

The previous prime is 70785787. The next prime is 70785833. The reversal of 70785818 is 81858707.

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

It can be written as a sum of positive squares in only one way, i.e., 56595529 + 14190289 = 7523^2 + 3767^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17696453 + ... + 17696456.

Almost surely, 2^70785818 is an apocalyptic number.

70785818 is a deficient number, since it is larger than the sum of its proper divisors (35392912).

70785818 is a wasteful number, since it uses less digits than its factorization.

70785818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35392911.

The product of its (nonzero) digits is 125440, while the sum is 44.

The square root of 70785818 is about 8413.4308103175. The cubic root of 70785818 is about 413.6649759117.

The spelling of 70785818 in words is "seventy million, seven hundred eighty-five thousand, eight hundred eighteen".