1667325587 has 4 divisors (see below), whose sum is σ = 1675227816. Its totient is φ = 1659423360.

The previous prime is 1667325577. The next prime is 1667325613. The reversal of 1667325587 is 7855237661.

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 1667325587 - 2⁴ = 1667325571 is a prime.

It is a super-2 number, since 2×1667325587² = 5559949226129789138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1667325577) 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, 3950798 + ... + 3951219.

It is an arithmetic number, because the mean of its divisors is an integer number (418806954).

Almost surely, 2^1667325587 is an apocalyptic number.

1667325587 is a deficient number, since it is larger than the sum of its proper divisors (7902229).

1667325587 is an equidigital number, since it uses as much as digits as its factorization.

1667325587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7902228.

The product of its digits is 2116800, while the sum is 50.

The square root of 1667325587 is about 40832.8983419007. The cubic root of 1667325587 is about 1185.7873281984.

The spelling of 1667325587 in words is "one billion, six hundred sixty-seven million, three hundred twenty-five thousand, five hundred eighty-seven".