1667042740 has 24 divisors (see below), whose sum is σ = 3819043872. Its totient is φ = 606197280.

The previous prime is 1667042719. The next prime is 1667042759. The reversal of 1667042740 is 472407661.

It is a self number, because there is not a number n which added to its sum of digits gives 1667042740.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3788514 + ... + 3788953.

It is an arithmetic number, because the mean of its divisors is an integer number (159126828).

Almost surely, 2^1667042740 is an apocalyptic number.

1667042740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1667042740 is an abundant number, since it is smaller than the sum of its proper divisors (2152001132).

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

1667042740 is a wasteful number, since it uses less digits than its factorization.

1667042740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7577487 (or 7577485 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 1667042740 is about 40829.4347254527. The cubic root of 1667042740 is about 1185.7202716382.

The spelling of 1667042740 in words is "one billion, six hundred sixty-seven million, forty-two thousand, seven hundred forty".