37668021361 has 4 divisors (see below), whose sum is σ = 38469468672. Its totient is φ = 36866574052.

The previous prime is 37668021319. The next prime is 37668021373. The reversal of 37668021361 is 16312086673.

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: 16312086673 = 90031 ⋅181183.

It is a cyclic number.

It is not a de Polignac number, because 37668021361 - 2¹¹ = 37668019313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37668021661) 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, 400723585 + ... + 400723678.

It is an arithmetic number, because the mean of its divisors is an integer number (9617367168).

Almost surely, 2^37668021361 is an apocalyptic number.

It is an amenable number.

37668021361 is a deficient number, since it is larger than the sum of its proper divisors (801447311).

37668021361 is an equidigital number, since it uses as much as digits as its factorization.

37668021361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801447310.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 37668021361 in words is "thirty-seven billion, six hundred sixty-eight million, twenty-one thousand, three hundred sixty-one".