1667417397 has 16 divisors (see below), whose sum is σ = 2280945408. Its totient is φ = 1082833920.

The previous prime is 1667417359. The next prime is 1667417413. The reversal of 1667417397 is 7937147661.

It is not a de Polignac number, because 1667417397 - 2¹² = 1667413301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667417327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72708 + ... + 92850.

It is an arithmetic number, because the mean of its divisors is an integer number (142559088).

Almost surely, 2^1667417397 is an apocalyptic number.

It is an amenable number.

1667417397 is a deficient number, since it is larger than the sum of its proper divisors (613528011).

1667417397 is a wasteful number, since it uses less digits than its factorization.

1667417397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20860.

The product of its digits is 1333584, while the sum is 51.

The square root of 1667417397 is about 40834.0225424829. The cubic root of 1667417397 is about 1185.8090926211.

The spelling of 1667417397 in words is "one billion, six hundred sixty-seven million, four hundred seventeen thousand, three hundred ninety-seven".