66673747 has 8 divisors (see below), whose sum is σ = 77242976. Its totient is φ = 56365632.

The previous prime is 66673723. The next prime is 66673751. The reversal of 66673747 is 74737666.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66673747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66673697 and 66673706.

It is not an unprimeable number, because it can be changed into a prime (66673787) 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, 64728 + ... + 65749.

It is an arithmetic number, because the mean of its divisors is an integer number (9655372).

Almost surely, 2^66673747 is an apocalyptic number.

66673747 is a deficient number, since it is larger than the sum of its proper divisors (10569229).

66673747 is a wasteful number, since it uses less digits than its factorization.

66673747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130557.

The product of its digits is 889056, while the sum is 46.

The square root of 66673747 is about 8165.3993778627. The cubic root of 66673747 is about 405.4944872026.

The spelling of 66673747 in words is "sixty-six million, six hundred seventy-three thousand, seven hundred forty-seven".