66563792 has 10 divisors (see below), whose sum is σ = 128967378. Its totient is φ = 33281888.

The previous prime is 66563773. The next prime is 66563807. The reversal of 66563792 is 29736566.

It can be written as a sum of positive squares in only one way, i.e., 60590656 + 5973136 = 7784^2 + 2444^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2080103 + ... + 2080134.

Almost surely, 2^66563792 is an apocalyptic number.

It is an amenable number.

66563792 is a deficient number, since it is larger than the sum of its proper divisors (62403586).

66563792 is a wasteful number, since it uses less digits than its factorization.

66563792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4160245 (or 4160239 counting only the distinct ones).

The product of its digits is 408240, while the sum is 44.

The square root of 66563792 is about 8158.6636160587. The cubic root of 66563792 is about 405.2714574966.

The spelling of 66563792 in words is "sixty-six million, five hundred sixty-three thousand, seven hundred ninety-two".