66651662 has 48 divisors (see below), whose sum is σ = 134373168. Its totient is φ = 24433920.

The previous prime is 66651659. The next prime is 66651703. The reversal of 66651662 is 26615666.

66651662 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16508 + ... + 20144.

It is an arithmetic number, because the mean of its divisors is an integer number (2799441).

Almost surely, 2^66651662 is an apocalyptic number.

66651662 is an abundant number, since it is smaller than the sum of its proper divisors (67721506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66651662 is a wasteful number, since it uses less digits than its factorization.

66651662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3681 (or 3674 counting only the distinct ones).

The product of its digits is 77760, while the sum is 38.

The square root of 66651662 is about 8164.0469131430. The cubic root of 66651662 is about 405.4497102845.

The spelling of 66651662 in words is "sixty-six million, six hundred fifty-one thousand, six hundred sixty-two".