1667167172 has 12 divisors (see below), whose sum is σ = 3182773776. Its totient is φ = 757803240.

The previous prime is 1667167163. The next prime is 1667167181. The reversal of 1667167172 is 2717617661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1667167163) and next prime (1667167181).

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 37890163 = 1667167172 / (1 + 6 + 6 + 7 + 1 + 6 + 7 + 1 + 7 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18945038 + ... + 18945125.

It is an arithmetic number, because the mean of its divisors is an integer number (265231148).

Almost surely, 2^1667167172 is an apocalyptic number.

It is an amenable number.

1667167172 is a deficient number, since it is larger than the sum of its proper divisors (1515606604).

1667167172 is a wasteful number, since it uses less digits than its factorization.

1667167172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37890178 (or 37890176 counting only the distinct ones).

The product of its digits is 148176, while the sum is 44.

The square root of 1667167172 is about 40830.9584996483. The cubic root of 1667167172 is about 1185.7497725563.

The spelling of 1667167172 in words is "one billion, six hundred sixty-seven million, one hundred sixty-seven thousand, one hundred seventy-two".