1664001436 has 6 divisors (see below), whose sum is σ = 2912002520. Its totient is φ = 832000716.

The previous prime is 1664001397. The next prime is 1664001439. The reversal of 1664001436 is 6341004661.

It is a junction number, because it is equal to n+sod(n) for n = 1664001398 and 1664001407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664001439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208000176 + ... + 208000183.

Almost surely, 2^1664001436 is an apocalyptic number.

It is an amenable number.

1664001436 is a deficient number, since it is larger than the sum of its proper divisors (1248001084).

1664001436 is a wasteful number, since it uses less digits than its factorization.

1664001436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416000363 (or 416000361 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1664001436 is about 40792.1737101616. The cubic root of 1664001436 is about 1184.9987682398.

The spelling of 1664001436 in words is "one billion, six hundred sixty-four million, one thousand, four hundred thirty-six".