65994043 has 4 divisors (see below), whose sum is σ = 66032488. Its totient is φ = 65955600.

The previous prime is 65994041. The next prime is 65994077. The reversal of 65994043 is 34049956.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65994043 - 2¹ = 65994041 is a prime.

It is a super-2 number, since 2×65994043² = 8710427422971698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65993987 and 65994005.

It is not an unprimeable number, because it can be changed into a prime (65994041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16521 + ... + 20122.

It is an arithmetic number, because the mean of its divisors is an integer number (16508122).

Almost surely, 2^65994043 is an apocalyptic number.

65994043 is a deficient number, since it is larger than the sum of its proper divisors (38445).

65994043 is a wasteful number, since it uses less digits than its factorization.

65994043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38444.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 65994043 is about 8123.6717683570. The cubic root of 65994043 is about 404.1118432788. Note that the first 3 decimals are identical.

The spelling of 65994043 in words is "sixty-five million, nine hundred ninety-four thousand, forty-three".