1667549940 has 48 divisors (see below), whose sum is σ = 5336161152. Its totient is φ = 381154176.

The previous prime is 1667549899. The next prime is 1667549963. The reversal of 1667549940 is 499457661.

1667549940 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1984759 + ... + 1985598.

It is an arithmetic number, because the mean of its divisors is an integer number (111170024).

Almost surely, 2^1667549940 is an apocalyptic number.

1667549940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1667549940 is an abundant number, since it is smaller than the sum of its proper divisors (3668611212).

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

1667549940 is a wasteful number, since it uses less digits than its factorization.

1667549940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3970376 (or 3970374 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 1667549940 is about 40835.6454583493. The cubic root of 1667549940 is about 1185.8405117748.

The spelling of 1667549940 in words is "one billion, six hundred sixty-seven million, five hundred forty-nine thousand, nine hundred forty".