38016665 has 4 divisors (see below), whose sum is σ = 45620004. Its totient is φ = 30413328.

The previous prime is 38016661. The next prime is 38016673. The reversal of 38016665 is 56661083.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56661083 = 1033 ⋅54851.

It can be written as a sum of positive squares in 2 ways, for example, as 22080601 + 15936064 = 4699^2 + 3992^2 .

It is a cyclic number.

It is not a de Polignac number, because 38016665 - 2² = 38016661 is a prime.

It is a super-3 number, since 3×38016665³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38016661) 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, 3801662 + ... + 3801671.

It is an arithmetic number, because the mean of its divisors is an integer number (11405001).

Almost surely, 2^38016665 is an apocalyptic number.

It is an amenable number.

38016665 is a deficient number, since it is larger than the sum of its proper divisors (7603339).

38016665 is an equidigital number, since it uses as much as digits as its factorization.

38016665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7603338.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 38016665 is about 6165.7655647940. The cubic root of 38016665 is about 336.2466802692.

The spelling of 38016665 in words is "thirty-eight million, sixteen thousand, six hundred sixty-five".