66704737 has 8 divisors (see below), whose sum is σ = 73042560. Its totient is φ = 60412560.

The previous prime is 66704689. The next prime is 66704749. The reversal of 66704737 is 73740766.

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 66704737 - 2¹¹ = 66702689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66704737.

It is not an unprimeable number, because it can be changed into a prime (66704237) 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, 8313 + ... + 14230.

It is an arithmetic number, because the mean of its divisors is an integer number (9130320).

Almost surely, 2^66704737 is an apocalyptic number.

It is an amenable number.

66704737 is a deficient number, since it is larger than the sum of its proper divisors (6337823).

66704737 is a wasteful number, since it uses less digits than its factorization.

66704737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22823.

The product of its (nonzero) digits is 148176, while the sum is 40.

The square root of 66704737 is about 8167.2967988191. The cubic root of 66704737 is about 405.5573021699.

The spelling of 66704737 in words is "sixty-six million, seven hundred four thousand, seven hundred thirty-seven".