1662406366 has 4 divisors (see below), whose sum is σ = 2493609552. Its totient is φ = 831203182.

The previous prime is 1662406363. The next prime is 1662406373. The reversal of 1662406366 is 6636042661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6636042661 = 571 ⋅11621791.

It is a super-3 number, since 3×1662406366³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662406363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415601590 + ... + 415601593.

It is an arithmetic number, because the mean of its divisors is an integer number (623402388).

Almost surely, 2^1662406366 is an apocalyptic number.

1662406366 is a deficient number, since it is larger than the sum of its proper divisors (831203186).

1662406366 is an equidigital number, since it uses as much as digits as its factorization.

1662406366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831203185.

The product of its (nonzero) digits is 186624, while the sum is 40.

The square root of 1662406366 is about 40772.6178458043. The cubic root of 1662406366 is about 1184.6200105019.

The spelling of 1662406366 in words is "one billion, six hundred sixty-two million, four hundred six thousand, three hundred sixty-six".