66710374 has 4 divisors (see below), whose sum is σ = 100065564. Its totient is φ = 33355186.

The previous prime is 66710351. The next prime is 66710377. The reversal of 66710374 is 47301766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47301766 = 2 ⋅23650883.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66710377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16677592 + ... + 16677595.

It is an arithmetic number, because the mean of its divisors is an integer number (25016391).

Almost surely, 2^66710374 is an apocalyptic number.

66710374 is a deficient number, since it is larger than the sum of its proper divisors (33355190).

66710374 is a wasteful number, since it uses less digits than its factorization.

66710374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33355189.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 66710374 is about 8167.6418873504. The cubic root of 66710374 is about 405.5687259569.

The spelling of 66710374 in words is "sixty-six million, seven hundred ten thousand, three hundred seventy-four".