66624783 has 8 divisors (see below), whose sum is σ = 89378688. Its totient is φ = 44143704.

The previous prime is 66624739. The next prime is 66624787. The reversal of 66624783 is 38742666.

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

It is not a de Polignac number, because 66624783 - 2²⁰ = 65576207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66624787) 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, 67635 + ... + 68612.

It is an arithmetic number, because the mean of its divisors is an integer number (11172336).

Almost surely, 2^66624783 is an apocalyptic number.

66624783 is a deficient number, since it is larger than the sum of its proper divisors (22753905).

66624783 is a wasteful number, since it uses less digits than its factorization.

66624783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136413.

The product of its digits is 290304, while the sum is 42.

The square root of 66624783 is about 8162.4005660100. The cubic root of 66624783 is about 405.3952002756.

The spelling of 66624783 in words is "sixty-six million, six hundred twenty-four thousand, seven hundred eighty-three".