66290297 has 8 divisors (see below), whose sum is σ = 69900960. Its totient is φ = 62691840.

The previous prime is 66290281. The next prime is 66290299. The reversal of 66290297 is 79209266.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66290297 - 2⁴ = 66290281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66290299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9458 + ... + 14900.

It is an arithmetic number, because the mean of its divisors is an integer number (8737620).

Almost surely, 2^66290297 is an apocalyptic number.

It is an amenable number.

66290297 is a deficient number, since it is larger than the sum of its proper divisors (3610663).

66290297 is a wasteful number, since it uses less digits than its factorization.

66290297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6103.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 66290297 is about 8141.8853467732. The cubic root of 66290297 is about 404.7156404566.

The spelling of 66290297 in words is "sixty-six million, two hundred ninety thousand, two hundred ninety-seven".