66705366 has 96 divisors (see below), whose sum is σ = 172827648. Its totient is φ = 16994880.

The previous prime is 66705347. The next prime is 66705377. The reversal of 66705366 is 66350766.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 118201 + ... + 118763.

It is an arithmetic number, because the mean of its divisors is an integer number (1800288).

Almost surely, 2^66705366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66705366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86413824).

66705366 is an abundant number, since it is smaller than the sum of its proper divisors (106122282).

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

66705366 is a wasteful number, since it uses less digits than its factorization.

66705366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 39.

The square root of 66705366 is about 8167.3353059612. The cubic root of 66705366 is about 405.5585769157.

The spelling of 66705366 in words is "sixty-six million, seven hundred five thousand, three hundred sixty-six".