1664654629 has 16 divisors (see below), whose sum is σ = 1838839680. Its totient is φ = 1494360000.

The previous prime is 1664654623. The next prime is 1664654633. The reversal of 1664654629 is 9264564661.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1664654629 is a prime.

It is a super-2 number, since 2×1664654629² = 5542150067702255282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664654623) 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, 465952 + ... + 469510.

It is an arithmetic number, because the mean of its divisors is an integer number (114927480).

Almost surely, 2^1664654629 is an apocalyptic number.

It is an amenable number.

1664654629 is a deficient number, since it is larger than the sum of its proper divisors (174185051).

1664654629 is a wasteful number, since it uses less digits than its factorization.

1664654629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4092.

The product of its digits is 1866240, while the sum is 49.

The square root of 1664654629 is about 40800.1792765669. The cubic root of 1664654629 is about 1185.1538024894.

The spelling of 1664654629 in words is "one billion, six hundred sixty-four million, six hundred fifty-four thousand, six hundred twenty-nine".