66366537 has 8 divisors (see below), whose sum is σ = 89083200. Its totient is φ = 43947120.

The previous prime is 66366511. The next prime is 66366541. The reversal of 66366537 is 73566366.

It is a happy number.

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

It is not a de Polignac number, because 66366537 - 2⁶ = 66366473 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (66366037) 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, 73789 + ... + 74682.

It is an arithmetic number, because the mean of its divisors is an integer number (11135400).

Almost surely, 2^66366537 is an apocalyptic number.

It is an amenable number.

66366537 is a deficient number, since it is larger than the sum of its proper divisors (22716663).

66366537 is a wasteful number, since it uses less digits than its factorization.

66366537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148623.

The product of its digits is 408240, while the sum is 42.

The square root of 66366537 is about 8146.5659636438. The cubic root of 66366537 is about 404.8707345426.

The spelling of 66366537 in words is "sixty-six million, three hundred sixty-six thousand, five hundred thirty-seven".