1662125497 has 4 divisors (see below), whose sum is σ = 1662762276. Its totient is φ = 1661488720.

The previous prime is 1662125473. The next prime is 1662125501. The reversal of 1662125497 is 7945212661.

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 1523262841 + 138862656 = 39029^2 + 11784^2 .

It is a cyclic number.

It is not a de Polignac number, because 1662125497 - 2⁷ = 1662125369 is a prime.

It is a super-2 number, since 2×1662125497² = 5525322335554994018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1662125447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314458 + ... + 319699.

It is an arithmetic number, because the mean of its divisors is an integer number (415690569).

Almost surely, 2^1662125497 is an apocalyptic number.

It is an amenable number.

1662125497 is a deficient number, since it is larger than the sum of its proper divisors (636779).

1662125497 is an equidigital number, since it uses as much as digits as its factorization.

1662125497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636778.

The product of its digits is 181440, while the sum is 43.

The square root of 1662125497 is about 40769.1733666504. The cubic root of 1662125497 is about 1184.5532916008.

The spelling of 1662125497 in words is "one billion, six hundred sixty-two million, one hundred twenty-five thousand, four hundred ninety-seven".