66357492 has 12 divisors (see below), whose sum is σ = 154834176. Its totient is φ = 22119160.

The previous prime is 66357491. The next prime is 66357497. The reversal of 66357492 is 29475366.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66357491) 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, 2764884 + ... + 2764907.

It is an arithmetic number, because the mean of its divisors is an integer number (12902848).

Almost surely, 2^66357492 is an apocalyptic number.

It is an amenable number.

66357492 is an abundant number, since it is smaller than the sum of its proper divisors (88476684).

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

66357492 is a wasteful number, since it uses less digits than its factorization.

66357492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5529798 (or 5529796 counting only the distinct ones).

The product of its digits is 272160, while the sum is 42.

The square root of 66357492 is about 8146.0108028409. The cubic root of 66357492 is about 404.8523406233.

The spelling of 66357492 in words is "sixty-six million, three hundred fifty-seven thousand, four hundred ninety-two".