66740074 has 8 divisors (see below), whose sum is σ = 101142468. Its totient is φ = 33025920.

The previous prime is 66740059. The next prime is 66740077. The reversal of 66740074 is 47004766.

It can be written as a sum of positive squares in 2 ways, for example, as 59954049 + 6786025 = 7743^2 + 2605^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (66740077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171817 + ... + 172204.

Almost surely, 2^66740074 is an apocalyptic number.

66740074 is a deficient number, since it is larger than the sum of its proper divisors (34402394).

66740074 is a wasteful number, since it uses less digits than its factorization.

66740074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344120.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 66740074 is about 8169.4598352645. The cubic root of 66740074 is about 405.6289045234.

It can be divided in two parts, 66 and 740074, that multiplied together give a palindrome (48844884).

The spelling of 66740074 in words is "sixty-six million, seven hundred forty thousand, seventy-four".