66078532 has 24 divisors (see below), whose sum is σ = 124986456. Its totient is φ = 30386688.

The previous prime is 66078521. The next prime is 66078557. The reversal of 66078532 is 23587066.

It can be written as a sum of positive squares in 4 ways, for example, as 1179396 + 64899136 = 1086^2 + 8056^2 .

It is a super-3 number, since 3×66078532³ (a number of 24 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66078491 and 66078500.

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, 13068 + ... + 17404.

It is an arithmetic number, because the mean of its divisors is an integer number (5207769).

Almost surely, 2^66078532 is an apocalyptic number.

It is an amenable number.

66078532 is a deficient number, since it is larger than the sum of its proper divisors (58907924).

66078532 is a wasteful number, since it uses less digits than its factorization.

66078532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4647 (or 4645 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 66078532 is about 8128.8702782121. The cubic root of 66078532 is about 404.2842247231.

The spelling of 66078532 in words is "sixty-six million, seventy-eight thousand, five hundred thirty-two".