381666290613 has 8 divisors (see below), whose sum is σ = 508892256000. Its totient is φ = 254442259488.

The previous prime is 381666290567. The next prime is 381666290647. The reversal of 381666290613 is 316092666183.

It is a happy number.

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

It is not a de Polignac number, because 381666290613 - 2⁶ = 381666290549 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381666290693) 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, 66108 + ... + 876186.

It is an arithmetic number, because the mean of its divisors is an integer number (63611532000).

Almost surely, 2^381666290613 is an apocalyptic number.

It is an amenable number.

381666290613 is a deficient number, since it is larger than the sum of its proper divisors (127225965387).

381666290613 is a wasteful number, since it uses less digits than its factorization.

381666290613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967131.

The product of its (nonzero) digits is 1679616, while the sum is 51.

The spelling of 381666290613 in words is "three hundred eighty-one billion, six hundred sixty-six million, two hundred ninety thousand, six hundred thirteen".