66010816 has 28 divisors (see below), whose sum is σ = 131380992. Its totient is φ = 32907008.

The previous prime is 66010801. The next prime is 66010817. The reversal of 66010816 is 61801066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66010817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23166 + ... + 25858.

Almost surely, 2^66010816 is an apocalyptic number.

It is an amenable number.

66010816 is a deficient number, since it is larger than the sum of its proper divisors (65370176).

66010816 is a wasteful number, since it uses less digits than its factorization.

66010816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3088 (or 3078 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 66010816 is about 8124.7040561488. The cubic root of 66010816 is about 404.1460766403.

It can be divided in two parts, 660 and 10816, that added together give a triangular number (11476 = T₁₅₁).

The spelling of 66010816 in words is "sixty-six million, ten thousand, eight hundred sixteen".