66732610357 has 4 divisors (see below), whose sum is σ = 76265840416. Its totient is φ = 57199380300.

The previous prime is 66732610313. The next prime is 66732610393. The reversal of 66732610357 is 75301623766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66732610357 - 2⁷ = 66732610229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66732610397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4766615019 + ... + 4766615032.

It is an arithmetic number, because the mean of its divisors is an integer number (19066460104).

Almost surely, 2^66732610357 is an apocalyptic number.

It is an amenable number.

66732610357 is a deficient number, since it is larger than the sum of its proper divisors (9533230059).

66732610357 is an equidigital number, since it uses as much as digits as its factorization.

66732610357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9533230058.

The product of its (nonzero) digits is 952560, while the sum is 46.

The spelling of 66732610357 in words is "sixty-six billion, seven hundred thirty-two million, six hundred ten thousand, three hundred fifty-seven".