1662565497 has 16 divisors (see below), whose sum is σ = 2248047168. Its totient is φ = 1092833280.

The previous prime is 1662565483. The next prime is 1662565501. The reversal of 1662565497 is 7945652661.

1662565497 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1662565497 - 2⁴ = 1662565481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1662565297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52722 + ... + 78132.

It is an arithmetic number, because the mean of its divisors is an integer number (140502948).

Almost surely, 2^1662565497 is an apocalyptic number.

It is an amenable number.

1662565497 is a deficient number, since it is larger than the sum of its proper divisors (585481671).

1662565497 is a wasteful number, since it uses less digits than its factorization.

1662565497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25720.

The product of its digits is 2721600, while the sum is 51.

The square root of 1662565497 is about 40774.5692435861. The cubic root of 1662565497 is about 1184.6578078693.

The spelling of 1662565497 in words is "one billion, six hundred sixty-two million, five hundred sixty-five thousand, four hundred ninety-seven".