66320477 has 8 divisors (see below), whose sum is σ = 71591040. Its totient is φ = 61248880.

The previous prime is 66320459. The next prime is 66320489. The reversal of 66320477 is 77402366.

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 66320477 - 2⁶ = 66320413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66320407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49049 + ... + 50382.

It is an arithmetic number, because the mean of its divisors is an integer number (8948880).

Almost surely, 2^66320477 is an apocalyptic number.

It is an amenable number.

66320477 is a deficient number, since it is larger than the sum of its proper divisors (5270563).

66320477 is a wasteful number, since it uses less digits than its factorization.

66320477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99483.

The product of its (nonzero) digits is 42336, while the sum is 35.

The square root of 66320477 is about 8143.7385149574. The cubic root of 66320477 is about 404.7770494684. Note that the first 3 decimals are identical.

The spelling of 66320477 in words is "sixty-six million, three hundred twenty thousand, four hundred seventy-seven".