65646945 has 192 divisors, whose sum is σ = 158505984. Its totient is φ = 24330240.

The previous prime is 65646937. The next prime is 65646967. The reversal of 65646945 is 54964656.

It is not a de Polignac number, because 65646945 - 2³ = 65646937 is a prime.

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 65646945.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1601125 + ... + 1601165.

It is an arithmetic number, because the mean of its divisors is an integer number (825552).

Almost surely, 2^65646945 is an apocalyptic number.

65646945 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

65646945 is an abundant number, since it is smaller than the sum of its proper divisors (92859039).

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

65646945 is a wasteful number, since it uses less digits than its factorization.

65646945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 109 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The square root of 65646945 is about 8102.2802346006. The cubic root of 65646945 is about 403.4021173737.

The spelling of 65646945 in words is "sixty-five million, six hundred forty-six thousand, nine hundred forty-five".