66970340 has 24 divisors (see below), whose sum is σ = 141486912. Its totient is φ = 26626400.

The previous prime is 66970331. The next prime is 66970349. The reversal of 66970340 is 4307966.

It is an interprime number because it is at equal distance from previous prime (66970331) and next prime (66970349).

It is a self number, because there is not a number n which added to its sum of digits gives 66970340.

It is not an unprimeable number, because it can be changed into a prime (66970349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6686 + ... + 13365.

It is an arithmetic number, because the mean of its divisors is an integer number (5895288).

Almost surely, 2^66970340 is an apocalyptic number.

It is an amenable number.

66970340 is an abundant number, since it is smaller than the sum of its proper divisors (74516572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66970340 is a wasteful number, since it uses less digits than its factorization.

66970340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20227 (or 20225 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 66970340 is about 8183.5407984564. The cubic root of 66970340 is about 406.0948681057.

The spelling of 66970340 in words is "sixty-six million, nine hundred seventy thousand, three hundred forty".