66519104 has 28 divisors (see below), whose sum is σ = 132269484. Its totient is φ = 33191424.

The previous prime is 66519091. The next prime is 66519107. The reversal of 66519104 is 40191566.

It can be written as a sum of positive squares in 2 ways, for example, as 57032704 + 9486400 = 7552^2 + 3080^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (66519107) 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, 47762 + ... + 49134.

Almost surely, 2^66519104 is an apocalyptic number.

66519104 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66519104 is a deficient number, since it is larger than the sum of its proper divisors (65750380).

66519104 is a wasteful number, since it uses less digits than its factorization.

66519104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142 (or 2132 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 66519104 is about 8155.9244724311. The cubic root of 66519104 is about 405.1807433872.

The spelling of 66519104 in words is "sixty-six million, five hundred nineteen thousand, one hundred four".