43964066 has 12 divisors (see below), whose sum is σ = 67780818. Its totient is φ = 21386592.

The previous prime is 43964051. The next prime is 43964069. The reversal of 43964066 is 66046934.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 43890625 + 73441 = 6625^2 + 271^2 .

It is a super-3 number, since 3×43964066³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43964069) 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, 5291 + ... + 10766.

Almost surely, 2^43964066 is an apocalyptic number.

43964066 is a deficient number, since it is larger than the sum of its proper divisors (23816752).

43964066 is a wasteful number, since it uses less digits than its factorization.

43964066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16133 (or 16096 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 43964066 is about 6630.5404002992. The cubic root of 43964066 is about 352.9387016482.

The spelling of 43964066 in words is "forty-three million, nine hundred sixty-four thousand, sixty-six".