1667612941 has 4 divisors (see below), whose sum is σ = 1667697984. Its totient is φ = 1667527900.

The previous prime is 1667612927. The next prime is 1667612959. The reversal of 1667612941 is 1492167661.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1667612941 - 2²⁵ = 1634058509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667612041) 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, 3486 + ... + 57856.

It is an arithmetic number, because the mean of its divisors is an integer number (416924496).

Almost surely, 2^1667612941 is an apocalyptic number.

It is an amenable number.

1667612941 is a deficient number, since it is larger than the sum of its proper divisors (85043).

1667612941 is an equidigital number, since it uses as much as digits as its factorization.

1667612941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85042.

The product of its digits is 108864, while the sum is 43.

The square root of 1667612941 is about 40836.4168482006. The cubic root of 1667612941 is about 1185.8554454999.

The spelling of 1667612941 in words is "one billion, six hundred sixty-seven million, six hundred twelve thousand, nine hundred forty-one".