66251941923 has 16 divisors (see below), whose sum is σ = 89246941056. Its totient is φ = 43713586560.

The previous prime is 66251941913. The next prime is 66251941933. The reversal of 66251941923 is 32914915266.

It is an interprime number because it is at equal distance from previous prime (66251941913) and next prime (66251941933).

It is not a de Polignac number, because 66251941923 - 2⁴ = 66251941907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66251941913) 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 15 ways as a sum of consecutive naturals, for example, 92836 + ... + 375662.

It is an arithmetic number, because the mean of its divisors is an integer number (5577933816).

Almost surely, 2^66251941923 is an apocalyptic number.

66251941923 is a deficient number, since it is larger than the sum of its proper divisors (22994999133).

66251941923 is a wasteful number, since it uses less digits than its factorization.

66251941923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283634.

The product of its digits is 699840, while the sum is 48.

The spelling of 66251941923 in words is "sixty-six billion, two hundred fifty-one million, nine hundred forty-one thousand, nine hundred twenty-three".