66957141401 has 4 divisors (see below), whose sum is σ = 67763854032. Its totient is φ = 66150428772.

The previous prime is 66957141371. The next prime is 66957141413. The reversal of 66957141401 is 10414175966.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-66957141401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66957141481) 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, 403356191 + ... + 403356356.

It is an arithmetic number, because the mean of its divisors is an integer number (16940963508).

Almost surely, 2^66957141401 is an apocalyptic number.

It is an amenable number.

66957141401 is a deficient number, since it is larger than the sum of its proper divisors (806712631).

66957141401 is an equidigital number, since it uses as much as digits as its factorization.

66957141401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806712630.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 66957141401 in words is "sixty-six billion, nine hundred fifty-seven million, one hundred forty-one thousand, four hundred one".