661469017 has 16 divisors (see below), whose sum is σ = 746577792. Its totient is φ = 580763520.

The previous prime is 661468999. The next prime is 661469051. The reversal of 661469017 is 710964166.

It is a cyclic number.

It is not a de Polignac number, because 661469017 - 2¹⁵ = 661436249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661469087) 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, 49828 + ... + 61690.

It is an arithmetic number, because the mean of its divisors is an integer number (46661112).

Almost surely, 2^661469017 is an apocalyptic number.

It is an amenable number.

661469017 is a deficient number, since it is larger than the sum of its proper divisors (85108775).

661469017 is a wasteful number, since it uses less digits than its factorization.

661469017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12048.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 661469017 is about 25719.0399704188. The cubic root of 661469017 is about 871.3042563748.

The spelling of 661469017 in words is "six hundred sixty-one million, four hundred sixty-nine thousand, seventeen".