65146992 has 80 divisors (see below), whose sum is σ = 184407840. Its totient is φ = 19726336.

The previous prime is 65146979. The next prime is 65146999. The reversal of 65146992 is 29964156.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65146999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22288 + ... + 25040.

It is an arithmetic number, because the mean of its divisors is an integer number (2305098).

Almost surely, 2^65146992 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 65146992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92203920).

65146992 is an abundant number, since it is smaller than the sum of its proper divisors (119260848).

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

65146992 is a wasteful number, since it uses less digits than its factorization.

65146992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810 (or 2804 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

The square root of 65146992 is about 8071.3686571733. The cubic root of 65146992 is about 402.3754320485.

The spelling of 65146992 in words is "sixty-five million, one hundred forty-six thousand, nine hundred ninety-two".