37316661 has 4 divisors (see below), whose sum is σ = 49755552. Its totient is φ = 24877772.

The previous prime is 37316641. The next prime is 37316687. The reversal of 37316661 is 16661373.

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: 16661373 = 3 ⋅5553791.

It is a cyclic number.

It is not a de Polignac number, because 37316661 - 2¹⁵ = 37283893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37316641) 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, 6219441 + ... + 6219446.

It is an arithmetic number, because the mean of its divisors is an integer number (12438888).

Almost surely, 2^37316661 is an apocalyptic number.

It is an amenable number.

37316661 is a deficient number, since it is larger than the sum of its proper divisors (12438891).

37316661 is a wasteful number, since it uses less digits than its factorization.

37316661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12438890.

The product of its digits is 13608, while the sum is 33.

The square root of 37316661 is about 6108.7364487265. The cubic root of 37316661 is about 334.1701029145.

The spelling of 37316661 in words is "thirty-seven million, three hundred sixteen thousand, six hundred sixty-one".