66020744 has 16 divisors (see below), whose sum is σ = 130304400. Its totient is φ = 31272912.

The previous prime is 66020743. The next prime is 66020753. The reversal of 66020744 is 44702066.

It is not an unprimeable number, because it can be changed into a prime (66020743) 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, 217022 + ... + 217325.

It is an arithmetic number, because the mean of its divisors is an integer number (8144025).

Almost surely, 2^66020744 is an apocalyptic number.

It is an amenable number.

66020744 is a deficient number, since it is larger than the sum of its proper divisors (64283656).

66020744 is a wasteful number, since it uses less digits than its factorization.

66020744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434372 (or 434368 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 66020744 is about 8125.3150092781. The cubic root of 66020744 is about 404.1663367600.

The spelling of 66020744 in words is "sixty-six million, twenty thousand, seven hundred forty-four".