66693043 has 4 divisors (see below), whose sum is σ = 68244088. Its totient is φ = 65142000.

The previous prime is 66693041. The next prime is 66693049. The reversal of 66693043 is 34039666.

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 66693043 - 2¹ = 66693041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66692993 and 66693011.

It is not an unprimeable number, because it can be changed into a prime (66693041) 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, 775458 + ... + 775543.

It is an arithmetic number, because the mean of its divisors is an integer number (17061022).

Almost surely, 2^66693043 is an apocalyptic number.

66693043 is a deficient number, since it is larger than the sum of its proper divisors (1551045).

66693043 is a wasteful number, since it uses less digits than its factorization.

66693043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551044.

The product of its (nonzero) digits is 69984, while the sum is 37.

The square root of 66693043 is about 8166.5808634948. The cubic root of 66693043 is about 405.5336013831.

The spelling of 66693043 in words is "sixty-six million, six hundred ninety-three thousand, forty-three".