1664697486 has 32 divisors (see below), whose sum is σ = 3377088000. Its totient is φ = 547002720.

The previous prime is 1664697439. The next prime is 1664697497. The reversal of 1664697486 is 6847964661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123751 + ... + 136541.

It is an arithmetic number, because the mean of its divisors is an integer number (105534000).

Almost surely, 2^1664697486 is an apocalyptic number.

1664697486 is an abundant number, since it is smaller than the sum of its proper divisors (1712390514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1664697486 is a wasteful number, since it uses less digits than its factorization.

1664697486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13104.

The product of its digits is 10450944, while the sum is 57.

The square root of 1664697486 is about 40800.7044792121. The cubic root of 1664697486 is about 1185.1639731077.

The spelling of 1664697486 in words is "one billion, six hundred sixty-four million, six hundred ninety-seven thousand, four hundred eighty-six".