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66705602494 = 2180491847903
BaseRepresentation
bin111110000111111101…
…101011011110111110
320101011211100201002011
4332013331223132332
52043103113234434
650351044321434
74551012160126
oct760775533676
9211154321064
1066705602494
1126320634503
1210b176a327a
1363a0a7740b
14332b297c86
151b062b7e64
hexf87f6b7be

66705602494 has 8 divisors (see below), whose sum is σ = 100064001600. Its totient is φ = 33350935296.

The previous prime is 66705602471. The next prime is 66705602497. The reversal of 66705602494 is 49420650766.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66705602497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887854 + ... + 960049.

It is an arithmetic number, because the mean of its divisors is an integer number (12508000200).

Almost surely, 266705602494 is an apocalyptic number.

66705602494 is a deficient number, since it is larger than the sum of its proper divisors (33358399106).

66705602494 is a wasteful number, since it uses less digits than its factorization.

66705602494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865954.

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 66705602494 in words is "sixty-six billion, seven hundred five million, six hundred two thousand, four hundred ninety-four".

Divisors: 1 2 18049 36098 1847903 3695806 33352801247 66705602494