66140602 has 8 divisors (see below), whose sum is σ = 108230112. Its totient is φ = 30063900.

The previous prime is 66140587. The next prime is 66140603. The reversal of 66140602 is 20604166.

It is a happy number.

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 (66140603) 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, 1503174 + ... + 1503217.

It is an arithmetic number, because the mean of its divisors is an integer number (13528764).

Almost surely, 2^66140602 is an apocalyptic number.

66140602 is a deficient number, since it is larger than the sum of its proper divisors (42089510).

66140602 is a wasteful number, since it uses less digits than its factorization.

66140602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3006404.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 66140602 is about 8132.6872557599. The cubic root of 66140602 is about 404.4107714645.

Adding to 66140602 its reverse (20604166), we get a palindrome (86744768).

The spelling of 66140602 in words is "sixty-six million, one hundred forty thousand, six hundred two".