66037970 has 16 divisors (see below), whose sum is σ = 122081688. Its totient is φ = 25701120.

The previous prime is 66037969. The next prime is 66037987. The reversal of 66037970 is 7973066.

It can be written as a sum of positive squares in 4 ways, for example, as 62552281 + 3485689 = 7909^2 + 1867^2 .

It is a super-2 number, since 2×66037970² = 8722026963441800, which contains 22 as substring.

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, 88871 + ... + 89610.

Almost surely, 2^66037970 is an apocalyptic number.

66037970 is a deficient number, since it is larger than the sum of its proper divisors (56043718).

66037970 is a wasteful number, since it uses less digits than its factorization.

66037970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178525.

The product of its (nonzero) digits is 47628, while the sum is 38.

The square root of 66037970 is about 8126.3749605836. The cubic root of 66037970 is about 404.2014851264.

The spelling of 66037970 in words is "sixty-six million, thirty-seven thousand, nine hundred seventy".