66669737 has 8 divisors (see below), whose sum is σ = 68887104. Its totient is φ = 64482768.

The previous prime is 66669719. The next prime is 66669739. The reversal of 66669737 is 73796666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66669737 - 2⁸ = 66669481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66669739) 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, 3098 + ... + 11955.

It is an arithmetic number, because the mean of its divisors is an integer number (8610888).

Almost surely, 2^66669737 is an apocalyptic number.

It is an amenable number.

66669737 is a deficient number, since it is larger than the sum of its proper divisors (2217367).

66669737 is a wasteful number, since it uses less digits than its factorization.

66669737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15199.

The product of its digits is 1714608, while the sum is 50.

The square root of 66669737 is about 8165.1538258627. The cubic root of 66669737 is about 405.4863577385.

The spelling of 66669737 in words is "sixty-six million, six hundred sixty-nine thousand, seven hundred thirty-seven".