1064655661 has 8 divisors (see below), whose sum is σ = 1115404544. Its totient is φ = 1014932160.

The previous prime is 1064655551. The next prime is 1064655673. The reversal of 1064655661 is 1665564601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1064655661 - 2¹³ = 1064647469 is a prime.

It is a super-2 number, since 2×1064655661² = 2266983352998693842, 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 (1064655061) 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, 254220 + ... + 258373.

It is an arithmetic number, because the mean of its divisors is an integer number (139425568).

Almost surely, 2^1064655661 is an apocalyptic number.

It is an amenable number.

1064655661 is a deficient number, since it is larger than the sum of its proper divisors (50748883).

1064655661 is an equidigital number, since it uses as much as digits as its factorization.

1064655661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512691.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 1064655661 is about 32629.0616015846. The cubic root of 1064655661 is about 1021.1034006562.

The spelling of 1064655661 in words is "one billion, sixty-four million, six hundred fifty-five thousand, six hundred sixty-one".