1662495605 has 4 divisors (see below), whose sum is σ = 1994994732. Its totient is φ = 1329996480.

The previous prime is 1662495599. The next prime is 1662495641. The reversal of 1662495605 is 5065942661.

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

It can be written as a sum of positive squares in 2 ways, for example, as 629708836 + 1032786769 = 25094^2 + 32137^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1662495605 is a prime.

It is a Duffinian number.

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, 166249556 + ... + 166249565.

It is an arithmetic number, because the mean of its divisors is an integer number (498748683).

Almost surely, 2^1662495605 is an apocalyptic number.

It is an amenable number.

1662495605 is a deficient number, since it is larger than the sum of its proper divisors (332499127).

1662495605 is an equidigital number, since it uses as much as digits as its factorization.

1662495605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332499126.

The product of its (nonzero) digits is 388800, while the sum is 44.

The square root of 1662495605 is about 40773.7121807667. The cubic root of 1662495605 is about 1184.6412071671.

The spelling of 1662495605 in words is "one billion, six hundred sixty-two million, four hundred ninety-five thousand, six hundred five".