66745061 has 4 divisors (see below), whose sum is σ = 66807552. Its totient is φ = 66682572.

The previous prime is 66745033. The next prime is 66745069. The reversal of 66745061 is 16054766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66745061 - 2¹⁴ = 66728677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66745069) 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 3 ways as a sum of consecutive naturals, for example, 29615 + ... + 31788.

It is an arithmetic number, because the mean of its divisors is an integer number (16701888).

Almost surely, 2^66745061 is an apocalyptic number.

It is an amenable number.

66745061 is a deficient number, since it is larger than the sum of its proper divisors (62491).

66745061 is a wasteful number, since it uses less digits than its factorization.

66745061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62490.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 66745061 is about 8169.7650517013. The cubic root of 66745061 is about 405.6390075037.

The spelling of 66745061 in words is "sixty-six million, seven hundred forty-five thousand, sixty-one".