381631975066 has 4 divisors (see below), whose sum is σ = 572447962602. Its totient is φ = 190815987532.

The previous prime is 381631975057. The next prime is 381631975093. The reversal of 381631975066 is 660579136183.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 257601927025 + 124030048041 = 507545^2 + 352179^2 .

It is a junction number, because it is equal to n+sod(n) for n = 381631974998 and 381631975016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95407993765 + ... + 95407993768.

Almost surely, 2^381631975066 is an apocalyptic number.

381631975066 is a deficient number, since it is larger than the sum of its proper divisors (190815987536).

381631975066 is a wasteful number, since it uses less digits than its factorization.

381631975066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190815987535.

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 381631975066 in words is "three hundred eighty-one billion, six hundred thirty-one million, nine hundred seventy-five thousand, sixty-six".