66716602 has 16 divisors (see below), whose sum is σ = 106996032. Its totient is φ = 31089600.

The previous prime is 66716591. The next prime is 66716603. The reversal of 66716602 is 20661766.

It is a super-2 number, since 2×66716602² = 8902209964852808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (66716603) 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, 6024 + ... + 13027.

It is an arithmetic number, because the mean of its divisors is an integer number (6687252).

Almost surely, 2^66716602 is an apocalyptic number.

66716602 is a deficient number, since it is larger than the sum of its proper divisors (40279430).

66716602 is a wasteful number, since it uses less digits than its factorization.

66716602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19173.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 66716602 is about 8168.0231390466. The cubic root of 66716602 is about 405.5813466998.

The spelling of 66716602 in words is "sixty-six million, seven hundred sixteen thousand, six hundred two".