659427661 has 16 divisors (see below), whose sum is σ = 715176000. Its totient is φ = 605985408.

The previous prime is 659427617. The next prime is 659427679. The reversal of 659427661 is 166724956.

It is a cyclic number.

It is not a de Polignac number, because 659427661 - 2⁷ = 659427533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659425661) 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, 119025 + ... + 124441.

It is an arithmetic number, because the mean of its divisors is an integer number (44698500).

Almost surely, 2^659427661 is an apocalyptic number.

It is an amenable number.

659427661 is a deficient number, since it is larger than the sum of its proper divisors (55748339).

659427661 is a wasteful number, since it uses less digits than its factorization.

659427661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5628.

The product of its digits is 544320, while the sum is 46.

The square root of 659427661 is about 25679.3236086934. The cubic root of 659427661 is about 870.4070236220.

The spelling of 659427661 in words is "six hundred fifty-nine million, four hundred twenty-seven thousand, six hundred sixty-one".