101778066 has 32 divisors (see below), whose sum is σ = 243573120. Its totient is φ = 31316112.

The previous prime is 101778043. The next prime is 101778091. The reversal of 101778066 is 660877101.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 101778066.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71790 + ... + 73193.

It is an arithmetic number, because the mean of its divisors is an integer number (7611660).

Almost surely, 2^101778066 is an apocalyptic number.

101778066 is an abundant number, since it is smaller than the sum of its proper divisors (141795054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101778066 is a wasteful number, since it uses less digits than its factorization.

101778066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145007 (or 145001 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 101778066 is about 10088.5115849663. The cubic root of 101778066 is about 466.8937546699.

The spelling of 101778066 in words is "one hundred one million, seven hundred seventy-eight thousand, sixty-six".