66497000 has 64 divisors (see below), whose sum is σ = 161038800. Its totient is φ = 25670400.

The previous prime is 66496987. The next prime is 66497009. The reversal of 66497000 is 79466.

It can be written as a sum of positive squares in 8 ways, for example, as 465124 + 66031876 = 682^2 + 8126^2 .

It is not an unprimeable number, because it can be changed into a prime (66497009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27854 + ... + 30146.

Almost surely, 2^66497000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66497000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80519400).

66497000 is an abundant number, since it is smaller than the sum of its proper divisors (94541800).

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

66497000 is a wasteful number, since it uses less digits than its factorization.

66497000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343 (or 2329 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 66497000 is about 8154.5692712736. The cubic root of 66497000 is about 405.1358585004.

The spelling of 66497000 in words is "sixty-six million, four hundred ninety-seven thousand".