1066654661 has 8 divisors (see below), whose sum is σ = 1127617920. Its totient is φ = 1006173792.

The previous prime is 1066654649. The next prime is 1066654669. The reversal of 1066654661 is 1664566601.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1066654661 is a prime.

It is a super-2 number, since 2×1066654661² = 2275504331666049842, 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 (1066654669) 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, 116045 + ... + 124898.

It is an arithmetic number, because the mean of its divisors is an integer number (140952240).

Almost surely, 2^1066654661 is an apocalyptic number.

It is an amenable number.

1066654661 is a deficient number, since it is larger than the sum of its proper divisors (60963259).

1066654661 is a wasteful number, since it uses less digits than its factorization.

1066654661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241195.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 1066654661 is about 32659.6794381084. The cubic root of 1066654661 is about 1021.7420764872.

The spelling of 1066654661 in words is "one billion, sixty-six million, six hundred fifty-four thousand, six hundred sixty-one".