38706661 has 4 divisors (see below), whose sum is σ = 44236192. Its totient is φ = 33177132.

The previous prime is 38706643. The next prime is 38706673. The reversal of 38706661 is 16660783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16660783 = 179 ⋅93077.

It is a cyclic number.

It is not a de Polignac number, because 38706661 - 2¹¹ = 38704613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38706661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38706601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2764755 + ... + 2764768.

It is an arithmetic number, because the mean of its divisors is an integer number (11059048).

Almost surely, 2^38706661 is an apocalyptic number.

It is an amenable number.

38706661 is a deficient number, since it is larger than the sum of its proper divisors (5529531).

38706661 is an equidigital number, since it uses as much as digits as its factorization.

38706661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5529530.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 38706661 is about 6221.4677528699. The cubic root of 38706661 is about 338.2687689871.

The spelling of 38706661 in words is "thirty-eight million, seven hundred six thousand, six hundred sixty-one".