77106644 has 12 divisors (see below), whose sum is σ = 135021600. Its totient is φ = 38529048.

The previous prime is 77106637. The next prime is 77106647. The reversal of 77106644 is 44660177.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77106647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2387 + ... + 12645.

It is an arithmetic number, because the mean of its divisors is an integer number (11251800).

Almost surely, 2^77106644 is an apocalyptic number.

It is an amenable number.

77106644 is a deficient number, since it is larger than the sum of its proper divisors (57914956).

77106644 is a wasteful number, since it uses less digits than its factorization.

77106644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12142 (or 12140 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 77106644 is about 8781.0388907008. The cubic root of 77106644 is about 425.6284018795.

The spelling of 77106644 in words is "seventy-seven million, one hundred six thousand, six hundred forty-four".