64999746 has 120 divisors (see below), whose sum is σ = 175912704. Its totient is φ = 17554320.

The previous prime is 64999729. The next prime is 64999751. The reversal of 64999746 is 64799946.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 64999692 and 64999701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1511601 + ... + 1511643.

Almost surely, 2^64999746 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64999746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87956352).

64999746 is an abundant number, since it is smaller than the sum of its proper divisors (110912958).

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

64999746 is a wasteful number, since it uses less digits than its factorization.

64999746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 86 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 64999746 is about 8062.2419958719. The cubic root of 64999746 is about 402.0720521329.

The spelling of 64999746 in words is "sixty-four million, nine hundred ninety-nine thousand, seven hundred forty-six".