66360440 has 16 divisors (see below), whose sum is σ = 149311080. Its totient is φ = 26544160.

The previous prime is 66360403. The next prime is 66360443. The reversal of 66360440 is 4406366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66360443) 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, 829466 + ... + 829545.

Almost surely, 2^66360440 is an apocalyptic number.

It is an amenable number.

66360440 is an abundant number, since it is smaller than the sum of its proper divisors (82950640).

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

66360440 is a wasteful number, since it uses less digits than its factorization.

66360440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659022 (or 1659018 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 66360440 is about 8146.1917482956. The cubic root of 66360440 is about 404.8583358621.

The spelling of 66360440 in words is "sixty-six million, three hundred sixty thousand, four hundred forty".