66951238 has 16 divisors (see below), whose sum is σ = 101488464. Its totient is φ = 33124000.

The previous prime is 66951233. The next prime is 66951239. The reversal of 66951238 is 83215966.

It is a self number, because there is not a number n which added to its sum of digits gives 66951238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66951233) 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, 98556 + ... + 99232.

It is an arithmetic number, because the mean of its divisors is an integer number (6343029).

Almost surely, 2^66951238 is an apocalyptic number.

66951238 is a deficient number, since it is larger than the sum of its proper divisors (34537226).

66951238 is a wasteful number, since it uses less digits than its factorization.

66951238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127.

The product of its digits is 77760, while the sum is 40.

The square root of 66951238 is about 8182.3736165003. The cubic root of 66951238 is about 406.0562541868.

The spelling of 66951238 in words is "sixty-six million, nine hundred fifty-one thousand, two hundred thirty-eight".