66715662 has 32 divisors (see below), whose sum is σ = 147585312. Its totient is φ = 19972224.

The previous prime is 66715643. The next prime is 66715673. The reversal of 66715662 is 26651766.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66715662.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8673 + ... + 14444.

It is an arithmetic number, because the mean of its divisors is an integer number (4612041).

Almost surely, 2^66715662 is an apocalyptic number.

66715662 is an abundant number, since it is smaller than the sum of its proper divisors (80869650).

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

66715662 is a wasteful number, since it uses less digits than its factorization.

66715662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23172.

The product of its digits is 90720, while the sum is 39.

The square root of 66715662 is about 8167.9655973810. The cubic root of 66715662 is about 405.5794418852.

The spelling of 66715662 in words is "sixty-six million, seven hundred fifteen thousand, six hundred sixty-two".