66381492376 has 32 divisors (see below), whose sum is σ = 126522151200. Its totient is φ = 32644788480.

The previous prime is 66381492313. The next prime is 66381492379. The reversal of 66381492376 is 67329418366.

It is a super-2 number, since 2×66381492376² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66381492379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51346 + ... + 367966.

It is an arithmetic number, because the mean of its divisors is an integer number (3953817225).

Almost surely, 2^66381492376 is an apocalyptic number.

It is an amenable number.

66381492376 is a deficient number, since it is larger than the sum of its proper divisors (60140658824).

66381492376 is a wasteful number, since it uses less digits than its factorization.

66381492376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317059 (or 317055 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 55.

The spelling of 66381492376 in words is "sixty-six billion, three hundred eighty-one million, four hundred ninety-two thousand, three hundred seventy-six".