64643334 has 16 divisors (see below), whose sum is σ = 147756288. Its totient is φ = 18469512.

The previous prime is 64643311. The next prime is 64643351. The reversal of 64643334 is 43334646.

It is a junction number, because it is equal to n+sod(n) for n = 64643295 and 64643304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 769522 + ... + 769605.

It is an arithmetic number, because the mean of its divisors is an integer number (9234768).

Almost surely, 2^64643334 is an apocalyptic number.

64643334 is an abundant number, since it is smaller than the sum of its proper divisors (83112954).

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

64643334 is a wasteful number, since it uses less digits than its factorization.

64643334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539139.

The product of its digits is 62208, while the sum is 33.

The square root of 64643334 is about 8040.1078350977. The cubic root of 64643334 is about 401.3358132085.

The spelling of 64643334 in words is "sixty-four million, six hundred forty-three thousand, three hundred thirty-four".