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BaseRepresentation
bin1001011101111101100010000…
…1101100010101100011000001
310020101000222210210002121101121
42113133120201230111203001
51144312012340434430032
610321004214311232241
7260223550042412254
oct22737304154254301
93211028723077347
10666261662030017
11183322a908a0489
1262885b82678681
132279c288907c61
14ba75344d6909b
155205edc783a97
hex25df621b158c1

666261662030017 has 8 divisors (see below), whose sum is σ = 667601775464000. Its totient is φ = 664921568275920.

The previous prime is 666261662029993. The next prime is 666261662030047. The reversal of 666261662030017 is 710030266162666.

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 2k-666261662030017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666261662030047) 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, 63822967 + ... + 73524787.

It is an arithmetic number, because the mean of its divisors is an integer number (83450221933000).

Almost surely, 2666261662030017 is an apocalyptic number.

It is an amenable number.

666261662030017 is a deficient number, since it is larger than the sum of its proper divisors (1340113433983).

666261662030017 is a wasteful number, since it uses less digits than its factorization.

666261662030017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9839943.

The product of its (nonzero) digits is 3919104, while the sum is 52.

The spelling of 666261662030017 in words is "six hundred sixty-six trillion, two hundred sixty-one billion, six hundred sixty-two million, thirty thousand, seventeen".