1667637472 has 24 divisors (see below), whose sum is σ = 3288521376. Its totient is φ = 832457472.

The previous prime is 1667637469. The next prime is 1667637523. The reversal of 1667637472 is 2747367661.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 22488 + ... + 61975.

It is an arithmetic number, because the mean of its divisors is an integer number (137021724).

Almost surely, 2^1667637472 is an apocalyptic number.

It is an amenable number.

1667637472 is a deficient number, since it is larger than the sum of its proper divisors (1620883904).

1667637472 is an equidigital number, since it uses as much as digits as its factorization.

1667637472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85090 (or 85082 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 49.

The square root of 1667637472 is about 40836.7172040065. The cubic root of 1667637472 is about 1185.8612602139.

The spelling of 1667637472 in words is "one billion, six hundred sixty-seven million, six hundred thirty-seven thousand, four hundred seventy-two".