66970946 has 12 divisors (see below), whose sum is σ = 116857638. Its totient is φ = 28701792.

The previous prime is 66970921. The next prime is 66970949. The reversal of 66970946 is 64907966.

It can be written as a sum of positive squares in only one way, i.e., 61795321 + 5175625 = 7861^2 + 2275^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66970946.

It is not an unprimeable number, because it can be changed into a prime (66970949) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 341591 + ... + 341786.

Almost surely, 2^66970946 is an apocalyptic number.

66970946 is a deficient number, since it is larger than the sum of its proper divisors (49886692).

66970946 is a wasteful number, since it uses less digits than its factorization.

66970946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683393 (or 683386 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 47.

The square root of 66970946 is about 8183.5778239105. The cubic root of 66970946 is about 406.0960929899.

The spelling of 66970946 in words is "sixty-six million, nine hundred seventy thousand, nine hundred forty-six".