66797929 has 9 divisors (see below), whose sum is σ = 73521469. Its totient is φ = 60643660.

The previous prime is 66797917. The next prime is 66797953. The reversal of 66797929 is 92979766.

The square root of 66797929 is 8173.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 66797929 - 2¹⁵ = 66765161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66797929.

It is not an unprimeable number, because it can be changed into a prime (66797909) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 89532 + ... + 90274.

Almost surely, 2^66797929 is an apocalyptic number.

66797929 is the 8173-rd square number.

66797929 is the 4087-th centered octagonal number.

It is an amenable number.

66797929 is a deficient number, since it is larger than the sum of its proper divisors (6723540).

66797929 is an frugal number, since it uses more digits than its factorization.

66797929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508 (or 754 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 55.

The cubic root of 66797929 is about 405.7460799124.

It can be divided in two parts, 667 and 97929, that added together give a square (98596 = 314²).

The spelling of 66797929 in words is "sixty-six million, seven hundred ninety-seven thousand, nine hundred twenty-nine".