1665000542 has 4 divisors (see below), whose sum is σ = 2497500816. Its totient is φ = 832500270.

The previous prime is 1665000539. The next prime is 1665000569. The reversal of 1665000542 is 2450005661.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 416250134 + ... + 416250137.

It is an arithmetic number, because the mean of its divisors is an integer number (624375204).

Almost surely, 2^1665000542 is an apocalyptic number.

1665000542 is a deficient number, since it is larger than the sum of its proper divisors (832500274).

1665000542 is an equidigital number, since it uses as much as digits as its factorization.

1665000542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832500273.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1665000542 is about 40804.4181676445. The cubic root of 1665000542 is about 1185.2358879276.

The spelling of 1665000542 in words is "one billion, six hundred sixty-five million, five hundred forty-two", and thus it is an aban number.