106778861 has 8 divisors (see below), whose sum is σ = 123291840. Its totient is φ = 90580608.

The previous prime is 106778851. The next prime is 106778873. The reversal of 106778861 is 168877601.

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

It is a cyclic number.

It is not a de Polignac number, because 106778861 - 2⁶ = 106778797 is a prime.

It is a super-2 number, since 2×106778861² = 22803450312914642, which contains 22 as substring.

106778861 is a modest number, since divided by 78861 gives 1067 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106778821) 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, 77951 + ... + 79308.

It is an arithmetic number, because the mean of its divisors is an integer number (15411480).

Almost surely, 2^106778861 is an apocalyptic number.

It is an amenable number.

106778861 is a deficient number, since it is larger than the sum of its proper divisors (16512979).

106778861 is an equidigital number, since it uses as much as digits as its factorization.

106778861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157363.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 106778861 is about 10333.3857471789. The cubic root of 106778861 is about 474.4186586988.

The spelling of 106778861 in words is "one hundred six million, seven hundred seventy-eight thousand, eight hundred sixty-one".