66823485 has 16 divisors (see below), whose sum is σ = 107067264. Its totient is φ = 35589312.

The previous prime is 66823483. The next prime is 66823529. The reversal of 66823485 is 58432866.

It is not a de Polignac number, because 66823485 - 2¹ = 66823483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66823483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9639 + ... + 15051.

It is an arithmetic number, because the mean of its divisors is an integer number (6691704).

Almost surely, 2^66823485 is an apocalyptic number.

It is an amenable number.

66823485 is a deficient number, since it is larger than the sum of its proper divisors (40243779).

66823485 is a wasteful number, since it uses less digits than its factorization.

66823485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6244.

The product of its digits is 276480, while the sum is 42.

The square root of 66823485 is about 8174.5632910878. The cubic root of 66823485 is about 405.7978176677.

The spelling of 66823485 in words is "sixty-six million, eight hundred twenty-three thousand, four hundred eighty-five".