66734972 has 12 divisors (see below), whose sum is σ = 116889696. Its totient is φ = 33337920.

The previous prime is 66734963. The next prime is 66734977. The reversal of 66734972 is 27943766.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66734977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1853 + ... + 11700.

It is an arithmetic number, because the mean of its divisors is an integer number (9740808).

Almost surely, 2^66734972 is an apocalyptic number.

It is an amenable number.

66734972 is a deficient number, since it is larger than the sum of its proper divisors (50154724).

66734972 is a wasteful number, since it uses less digits than its factorization.

66734972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14788 (or 14786 counting only the distinct ones).

The product of its digits is 381024, while the sum is 44.

The square root of 66734972 is about 8169.1475687491. The cubic root of 66734972 is about 405.6185680480.

The spelling of 66734972 in words is "sixty-six million, seven hundred thirty-four thousand, nine hundred seventy-two".