1667271492 has 24 divisors (see below), whose sum is σ = 4322556000. Its totient is φ = 555757128.

The previous prime is 1667271491. The next prime is 1667271503. The reversal of 1667271492 is 2941727661.

It is not an unprimeable number, because it can be changed into a prime (1667271491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7718742 + ... + 7718957.

It is an arithmetic number, because the mean of its divisors is an integer number (180106500).

Almost surely, 2^1667271492 is an apocalyptic number.

1667271492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1667271492 is an abundant number, since it is smaller than the sum of its proper divisors (2655284508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1667271492 is a wasteful number, since it uses less digits than its factorization.

1667271492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15437712 (or 15437704 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 1667271492 is about 40832.2359417164. The cubic root of 1667271492 is about 1185.7745040966.

The spelling of 1667271492 in words is "one billion, six hundred sixty-seven million, two hundred seventy-one thousand, four hundred ninety-two".