64650768 has 240 divisors, whose sum is σ = 222235776. Its totient is φ = 15759360.

The previous prime is 64650767. The next prime is 64650793. The reversal of 64650768 is 86705646.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64650763) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1576828 + ... + 1576868.

Almost surely, 2^64650768 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 64650768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111117888).

64650768 is an abundant number, since it is smaller than the sum of its proper divisors (157585008).

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

64650768 is a wasteful number, since it uses less digits than its factorization.

64650768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 64650768 is about 8040.5701290394. The cubic root of 64650768 is about 401.3511971926.

The spelling of 64650768 in words is "sixty-four million, six hundred fifty thousand, seven hundred sixty-eight".