64067643 has 6 divisors (see below), whose sum is σ = 92542164. Its totient is φ = 42711756.

The previous prime is 64067621. The next prime is 64067659. The reversal of 64067643 is 34676046.

64067643 is a `hidden beast` number, since 6 + 4 + 0 + 6 + 7 + 643 = 666.

It is not a de Polignac number, because 64067643 - 2⁶ = 64067579 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64067598 and 64067607.

It is not an unprimeable number, because it can be changed into a prime (64067603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3559305 + ... + 3559322.

It is an arithmetic number, because the mean of its divisors is an integer number (15423694).

Almost surely, 2^64067643 is an apocalyptic number.

64067643 is a deficient number, since it is larger than the sum of its proper divisors (28474521).

64067643 is a wasteful number, since it uses less digits than its factorization.

64067643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7118633 (or 7118630 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 64067643 is about 8004.2265710061. The cubic root of 64067643 is about 400.1408732976.

The spelling of 64067643 in words is "sixty-four million, sixty-seven thousand, six hundred forty-three".