66869630 has 16 divisors (see below), whose sum is σ = 120466224. Its totient is φ = 26725440.

The previous prime is 66869617. The next prime is 66869641. The reversal of 66869630 is 3696866.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15290 + ... + 19170.

It is an arithmetic number, because the mean of its divisors is an integer number (7529139).

Almost surely, 2^66869630 is an apocalyptic number.

66869630 is a deficient number, since it is larger than the sum of its proper divisors (53596594).

66869630 is a wasteful number, since it uses less digits than its factorization.

66869630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5611.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 66869630 is about 8177.3852789263. The cubic root of 66869630 is about 405.8912041552.

The spelling of 66869630 in words is "sixty-six million, eight hundred sixty-nine thousand, six hundred thirty".