65977912 has 144 divisors (see below), whose sum is σ = 171937080. Its totient is φ = 23506560.

The previous prime is 65977909. The next prime is 65977921. The reversal of 65977912 is 21977956.

It is a happy number.

Its product of digits (238140) is a multiple of the sum of its prime divisors (140).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 616563 + ... + 616669.

Almost surely, 2^65977912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65977912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85968540).

65977912 is an abundant number, since it is smaller than the sum of its proper divisors (105959168).

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

65977912 is a wasteful number, since it uses less digits than its factorization.

65977912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 140 counting only the distinct ones).

The product of its digits is 238140, while the sum is 46.

The square root of 65977912 is about 8122.6788684522. The cubic root of 65977912 is about 404.0789147545.

The spelling of 65977912 in words is "sixty-five million, nine hundred seventy-seven thousand, nine hundred twelve".