238157666 has 16 divisors (see below), whose sum is σ = 380803200. Its totient is φ = 111382128.

The previous prime is 238157659. The next prime is 238157683. The reversal of 238157666 is 666751832.

It is an unprimeable number.

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, 36665 + ... + 42668.

It is an arithmetic number, because the mean of its divisors is an integer number (23800200).

Almost surely, 2^238157666 is an apocalyptic number.

238157666 is a deficient number, since it is larger than the sum of its proper divisors (142645534).

238157666 is a wasteful number, since it uses less digits than its factorization.

238157666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79433.

The product of its digits is 362880, while the sum is 44.

The square root of 238157666 is about 15432.3577589427. The cubic root of 238157666 is about 619.8522592824.

The spelling of 238157666 in words is "two hundred thirty-eight million, one hundred fifty-seven thousand, six hundred sixty-six".