371666491 has 4 divisors (see below), whose sum is σ = 424761712. Its totient is φ = 318571272.

The previous prime is 371666489. The next prime is 371666497. The reversal of 371666491 is 194666173.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 371666491 - 2¹ = 371666489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (371666497) 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, 26547600 + ... + 26547613.

It is an arithmetic number, because the mean of its divisors is an integer number (106190428).

Almost surely, 2^371666491 is an apocalyptic number.

371666491 is a deficient number, since it is larger than the sum of its proper divisors (53095221).

371666491 is an equidigital number, since it uses as much as digits as its factorization.

371666491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53095220.

The product of its digits is 163296, while the sum is 43.

The square root of 371666491 is about 19278.6537652399. The cubic root of 371666491 is about 718.9816435367.

It can be divided in two parts, 3716 and 66491, that added together give a palindrome (70207).

The spelling of 371666491 in words is "three hundred seventy-one million, six hundred sixty-six thousand, four hundred ninety-one".