66747346 has 4 divisors (see below), whose sum is σ = 100121022. Its totient is φ = 33373672.

The previous prime is 66747341. The next prime is 66747347. The reversal of 66747346 is 64374766.

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

It can be written as a sum of positive squares in only one way, i.e., 42393121 + 24354225 = 6511^2 + 4935^2 .

It is not an unprimeable number, because it can be changed into a prime (66747341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16686835 + ... + 16686838.

Almost surely, 2^66747346 is an apocalyptic number.

66747346 is a deficient number, since it is larger than the sum of its proper divisors (33373676).

66747346 is a wasteful number, since it uses less digits than its factorization.

66747346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33373675.

The product of its digits is 508032, while the sum is 43.

The square root of 66747346 is about 8169.9048954073. The cubic root of 66747346 is about 405.6436364333.

The spelling of 66747346 in words is "sixty-six million, seven hundred forty-seven thousand, three hundred forty-six".