66940970 has 8 divisors (see below), whose sum is σ = 120493764. Its totient is φ = 26776384.

The previous prime is 66940969. The next prime is 66941041. The reversal of 66940970 is 7904966.

It can be written as a sum of positive squares in 2 ways, for example, as 66699889 + 241081 = 8167^2 + 491^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3347039 + ... + 3347058.

Almost surely, 2^66940970 is an apocalyptic number.

66940970 is a deficient number, since it is larger than the sum of its proper divisors (53552794).

66940970 is a wasteful number, since it uses less digits than its factorization.

66940970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6694104.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 66940970 is about 8181.7461461475. The cubic root of 66940970 is about 406.0354948058.

The spelling of 66940970 in words is "sixty-six million, nine hundred forty thousand, nine hundred seventy".