1664564677756 has 24 divisors (see below), whose sum is σ = 2924337294144. Its totient is φ = 829043454720.

The previous prime is 1664564677753. The next prime is 1664564677861. The reversal of 1664564677756 is 6577764654661.

It is a super-2 number, since 2×1664564677756² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664564677753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1330221 + ... + 2258011.

It is an arithmetic number, because the mean of its divisors is an integer number (121847387256).

Almost surely, 2^{1664564677756} is an apocalyptic number.

It is an amenable number.

1664564677756 is a deficient number, since it is larger than the sum of its proper divisors (1259772616388).

1664564677756 is a wasteful number, since it uses less digits than its factorization.

1664564677756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929541 (or 929539 counting only the distinct ones).

The product of its digits is 1066867200, while the sum is 70.

The spelling of 1664564677756 in words is "one trillion, six hundred sixty-four billion, five hundred sixty-four million, six hundred seventy-seven thousand, seven hundred fifty-six".