37666591097 has 4 divisors (see below), whose sum is σ = 39649043280. Its totient is φ = 35684138916.

The previous prime is 37666591049. The next prime is 37666591099. The reversal of 37666591097 is 79019566673.

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.

It is a cyclic number.

It is not a de Polignac number, because 37666591097 - 2²⁰ = 37665542521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37666591099) 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, 991226063 + ... + 991226100.

It is an arithmetic number, because the mean of its divisors is an integer number (9912260820).

Almost surely, 2^37666591097 is an apocalyptic number.

It is an amenable number.

37666591097 is a deficient number, since it is larger than the sum of its proper divisors (1982452183).

37666591097 is a wasteful number, since it uses less digits than its factorization.

37666591097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982452182.

The product of its (nonzero) digits is 12859560, while the sum is 59.

The spelling of 37666591097 in words is "thirty-seven billion, six hundred sixty-six million, five hundred ninety-one thousand, ninety-seven".