66340475 has 6 divisors (see below), whose sum is σ = 82262220. Its totient is φ = 53072360.

The previous prime is 66340433. The next prime is 66340481. The reversal of 66340475 is 57404366.

It is not a de Polignac number, because 66340475 - 2⁶ = 66340411 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1326785 + ... + 1326834.

It is an arithmetic number, because the mean of its divisors is an integer number (13710370).

Almost surely, 2^66340475 is an apocalyptic number.

66340475 is a deficient number, since it is larger than the sum of its proper divisors (15921745).

66340475 is a wasteful number, since it uses less digits than its factorization.

66340475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2653629 (or 2653624 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 66340475 is about 8144.9662368852. The cubic root of 66340475 is about 404.8177303074.

It can be divided in two parts, 663404 and 75, that multiplied together give a triangular number (49755300 = T₉₉₇₅).

The spelling of 66340475 in words is "sixty-six million, three hundred forty thousand, four hundred seventy-five".