666740037 has 8 divisors (see below), whose sum is σ = 913013536. Its totient is φ = 432479952.

The previous prime is 666740023. The next prime is 666740059. The reversal of 666740037 is 730047666.

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

It is not a de Polignac number, because 666740037 - 2⁸ = 666739781 is a prime.

It is a super-2 number, since 2×666740037² = 889084553877522738, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666739977 and 666740004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666744037) by changing a digit.

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, 3003223 + ... + 3003444.

It is an arithmetic number, because the mean of its divisors is an integer number (114126692).

Almost surely, 2^666740037 is an apocalyptic number.

It is an amenable number.

666740037 is a deficient number, since it is larger than the sum of its proper divisors (246273499).

666740037 is a wasteful number, since it uses less digits than its factorization.

666740037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6006707.

The product of its (nonzero) digits is 127008, while the sum is 39.

The square root of 666740037 is about 25821.3097460218. The cubic root of 666740037 is about 873.6125110057.

The spelling of 666740037 in words is "six hundred sixty-six million, seven hundred forty thousand, thirty-seven".