66240506 has 8 divisors (see below), whose sum is σ = 103680864. Its totient is φ = 31680220.

The previous prime is 66240497. The next prime is 66240509. The reversal of 66240506 is 60504266.

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

It is not an unprimeable number, because it can be changed into a prime (66240509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 719960 + ... + 720051.

It is an arithmetic number, because the mean of its divisors is an integer number (12960108).

Almost surely, 2^66240506 is an apocalyptic number.

66240506 is a deficient number, since it is larger than the sum of its proper divisors (37440358).

66240506 is a wasteful number, since it uses less digits than its factorization.

66240506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440036.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 66240506 is about 8138.8270653700. The cubic root of 66240506 is about 404.6142870424.

The spelling of 66240506 in words is "sixty-six million, two hundred forty thousand, five hundred six".