64666746 has 12 divisors (see below), whose sum is σ = 140111322. Its totient is φ = 21555576.

The previous prime is 64666741. The next prime is 64666753. The reversal of 64666746 is 64766646.

It can be written as a sum of positive squares in only one way, i.e., 59120721 + 5546025 = 7689^2 + 2355^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (64666741) 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 5 ways as a sum of consecutive naturals, for example, 1796281 + ... + 1796316.

Almost surely, 2^64666746 is an apocalyptic number.

64666746 is an abundant number, since it is smaller than the sum of its proper divisors (75444576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64666746 is a wasteful number, since it uses less digits than its factorization.

64666746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3592605 (or 3592602 counting only the distinct ones).

The product of its digits is 870912, while the sum is 45.

The square root of 64666746 is about 8041.5636539171. The cubic root of 64666746 is about 401.3842582137.

The spelling of 64666746 in words is "sixty-four million, six hundred sixty-six thousand, seven hundred forty-six".