66834999 has 24 divisors (see below), whose sum is σ = 120362112. Its totient is φ = 34719120.

The previous prime is 66834983. The next prime is 66835009. The reversal of 66834999 is 99943866.

It is a happy number.

It is not a de Polignac number, because 66834999 - 2⁴ = 66834983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66834919) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47529 + ... + 48914.

It is an arithmetic number, because the mean of its divisors is an integer number (5015088).

Almost surely, 2^66834999 is an apocalyptic number.

66834999 is a deficient number, since it is larger than the sum of its proper divisors (53527113).

66834999 is a wasteful number, since it uses less digits than its factorization.

66834999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96467 (or 96464 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The square root of 66834999 is about 8175.2675185586. The cubic root of 66834999 is about 405.8211232852.

The spelling of 66834999 in words is "sixty-six million, eight hundred thirty-four thousand, nine hundred ninety-nine".