66930477 has 4 divisors (see below), whose sum is σ = 89240640. Its totient is φ = 44620316.

The previous prime is 66930473. The next prime is 66930499. The reversal of 66930477 is 77403966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66930477 - 2² = 66930473 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66930473) 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 3 ways as a sum of consecutive naturals, for example, 11155077 + ... + 11155082.

It is an arithmetic number, because the mean of its divisors is an integer number (22310160).

Almost surely, 2^66930477 is an apocalyptic number.

It is an amenable number.

66930477 is a deficient number, since it is larger than the sum of its proper divisors (22310163).

66930477 is a wasteful number, since it uses less digits than its factorization.

66930477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22310162.

The product of its (nonzero) digits is 190512, while the sum is 42.

The square root of 66930477 is about 8181.1048764821. The cubic root of 66930477 is about 406.0142783366.

The spelling of 66930477 in words is "sixty-six million, nine hundred thirty thousand, four hundred seventy-seven".