66397502 has 8 divisors (see below), whose sum is σ = 99633576. Its totient is φ = 33186312.

The previous prime is 66397453. The next prime is 66397531. The reversal of 66397502 is 20579366.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3473 + ... + 12035.

It is an arithmetic number, because the mean of its divisors is an integer number (12454197).

Almost surely, 2^66397502 is an apocalyptic number.

66397502 is a deficient number, since it is larger than the sum of its proper divisors (33236074).

66397502 is a wasteful number, since it uses less digits than its factorization.

66397502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12442.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 66397502 is about 8148.4662360471. The cubic root of 66397502 is about 404.9336923402.

It can be divided in two parts, 6639 and 7502, that added together give a palindrome (14141).

The spelling of 66397502 in words is "sixty-six million, three hundred ninety-seven thousand, five hundred two".