66697366 has 4 divisors (see below), whose sum is σ = 100046052. Its totient is φ = 33348682.

The previous prime is 66697349. The next prime is 66697381. The reversal of 66697366 is 66379666.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16674340 + ... + 16674343.

It is an arithmetic number, because the mean of its divisors is an integer number (25011513).

Almost surely, 2^66697366 is an apocalyptic number.

66697366 is a deficient number, since it is larger than the sum of its proper divisors (33348686).

66697366 is a wasteful number, since it uses less digits than its factorization.

66697366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33348685.

The product of its digits is 1469664, while the sum is 49.

The square root of 66697366 is about 8166.8455354561. The cubic root of 66697366 is about 405.5423633359.

The spelling of 66697366 in words is "sixty-six million, six hundred ninety-seven thousand, three hundred sixty-six".