66061164 has 24 divisors (see below), whose sum is σ = 166000240. Its totient is φ = 20326464.

The previous prime is 66061153. The next prime is 66061183. The reversal of 66061164 is 46116066.

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, 211579 + ... + 211890.

Almost surely, 2^66061164 is an apocalyptic number.

It is an amenable number.

66061164 is an abundant number, since it is smaller than the sum of its proper divisors (99939076).

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

66061164 is a wasteful number, since it uses less digits than its factorization.

66061164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423489 (or 423487 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 66061164 is about 8127.8019168776. The cubic root of 66061164 is about 404.2488010967.

It can be divided in two parts, 660611 and 64, that added together give a triangular number (660675 = T₁₁₄₉).

The spelling of 66061164 in words is "sixty-six million, sixty-one thousand, one hundred sixty-four".