106778655 has 20 divisors (see below), whose sum is σ = 191411352. Its totient is φ = 56948400.

The previous prime is 106778653. The next prime is 106778669. The reversal of 106778655 is 556877601.

It is not a de Polignac number, because 106778655 - 2¹ = 106778653 is a prime.

It is a super-2 number, since 2×106778655² = 22803362327218050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 106778655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106778653) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 131421 + ... + 132230.

Almost surely, 2^106778655 is an apocalyptic number.

106778655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

106778655 is a deficient number, since it is larger than the sum of its proper divisors (84632697).

106778655 is an equidigital number, since it uses as much as digits as its factorization.

106778655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263668 (or 263659 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The square root of 106778655 is about 10333.3757794827. The cubic root of 106778655 is about 474.4183536125.

The spelling of 106778655 in words is "one hundred six million, seven hundred seventy-eight thousand, six hundred fifty-five".