66312793 has 8 divisors (see below), whose sum is σ = 70787520. Its totient is φ = 61936560.

The previous prime is 66312787. The next prime is 66312797. The reversal of 66312793 is 39721366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66312793 - 2¹⁷ = 66181721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66312797) 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 7 ways as a sum of consecutive naturals, for example, 23230 + ... + 25927.

It is an arithmetic number, because the mean of its divisors is an integer number (8848440).

Almost surely, 2^66312793 is an apocalyptic number.

It is an amenable number.

66312793 is a deficient number, since it is larger than the sum of its proper divisors (4474727).

66312793 is a wasteful number, since it uses less digits than its factorization.

66312793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49247.

The product of its digits is 40824, while the sum is 37.

The square root of 66312793 is about 8143.2667277942. The cubic root of 66312793 is about 404.7614161521.

It can be divided in two parts, 663 and 12793, that added together give a square (13456 = 116²).

The spelling of 66312793 in words is "sixty-six million, three hundred twelve thousand, seven hundred ninety-three".