66672734 has 4 divisors (see below), whose sum is σ = 100009104. Its totient is φ = 33336366.

The previous prime is 66672731. The next prime is 66672737. The reversal of 66672734 is 43727666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43727666 = 2 ⋅21863833.

It is an interprime number because it is at equal distance from previous prime (66672731) and next prime (66672737).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66672691 and 66672700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66672731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16668182 + ... + 16668185.

It is an arithmetic number, because the mean of its divisors is an integer number (25002276).

Almost surely, 2^66672734 is an apocalyptic number.

66672734 is a deficient number, since it is larger than the sum of its proper divisors (33336370).

66672734 is a wasteful number, since it uses less digits than its factorization.

66672734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33336369.

The product of its digits is 254016, while the sum is 41.

The square root of 66672734 is about 8165.3373475932. The cubic root of 66672734 is about 405.4924335807.

It can be divided in two parts, 66 and 672734, that multiplied together give a palindrome (44400444).

The spelling of 66672734 in words is "sixty-six million, six hundred seventy-two thousand, seven hundred thirty-four".