66742207 has 8 divisors (see below), whose sum is σ = 76952736. Its totient is φ = 56700672.

The previous prime is 66742199. The next prime is 66742237. The reversal of 66742207 is 70224766.

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

It is not a de Polignac number, because 66742207 - 2³ = 66742199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66742237) 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, 41398 + ... + 42979.

It is an arithmetic number, because the mean of its divisors is an integer number (9619092).

Almost surely, 2^66742207 is an apocalyptic number.

66742207 is a deficient number, since it is larger than the sum of its proper divisors (10210529).

66742207 is a wasteful number, since it uses less digits than its factorization.

66742207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84497.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 66742207 is about 8169.5903814084. The cubic root of 66742207 is about 405.6332257515.

The spelling of 66742207 in words is "sixty-six million, seven hundred forty-two thousand, two hundred seven".