66495040 has 28 divisors (see below), whose sum is σ = 158342076. Its totient is φ = 26597888.

The previous prime is 66494993. The next prime is 66495053. The reversal of 66495040 is 4059466.

It can be written as a sum of positive squares in 2 ways, for example, as 48108096 + 18386944 = 6936^2 + 4288^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66494987 and 66495005.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103579 + ... + 104218.

Almost surely, 2^66495040 is an apocalyptic number.

It is an amenable number.

66495040 is an abundant number, since it is smaller than the sum of its proper divisors (91847036).

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

66495040 is a wasteful number, since it uses less digits than its factorization.

66495040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207814 (or 207804 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 66495040 is about 8154.4490923667. The cubic root of 66495040 is about 405.1318779996.

The spelling of 66495040 in words is "sixty-six million, four hundred ninety-five thousand, forty".