66747423 has 8 divisors (see below), whose sum is σ = 94231728. Its totient is φ = 41880704.

The previous prime is 66747413. The next prime is 66747431. The reversal of 66747423 is 32474766.

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 66747423 - 2⁴ = 66747407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66747413) 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, 654336 + ... + 654437.

It is an arithmetic number, because the mean of its divisors is an integer number (11778966).

Almost surely, 2^66747423 is an apocalyptic number.

66747423 is a deficient number, since it is larger than the sum of its proper divisors (27484305).

66747423 is a wasteful number, since it uses less digits than its factorization.

66747423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308793.

The product of its digits is 169344, while the sum is 39.

The square root of 66747423 is about 8169.9096078231. The cubic root of 66747423 is about 405.6437924173.

The spelling of 66747423 in words is "sixty-six million, seven hundred forty-seven thousand, four hundred twenty-three".