66920474 has 8 divisors (see below), whose sum is σ = 100708608. Its totient is φ = 33350940.

The previous prime is 66920473. The next prime is 66920509. The reversal of 66920474 is 47402966.

66920474 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (66920473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53882 + ... + 55109.

It is an arithmetic number, because the mean of its divisors is an integer number (12588576).

Almost surely, 2^66920474 is an apocalyptic number.

66920474 is a deficient number, since it is larger than the sum of its proper divisors (33788134).

66920474 is a wasteful number, since it uses less digits than its factorization.

66920474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109300.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 66920474 is about 8180.4935058956. The cubic root of 66920474 is about 405.9940505652.

The spelling of 66920474 in words is "sixty-six million, nine hundred twenty thousand, four hundred seventy-four".